The Yàgbà people na one major North-East Yorùbá (NEY) subgroup wey dey mainly inside the Okun cultural and linguistic continuum of the Niger-Benue confluence basin. As dem dey geographically concentrated across the western part of Kogi State and the border areas of Kwara and Ekiti States, the Yàgbà people develop decentralized political systems wey base on lineage, wey historically different from the centralized monarchical structures of central and western Yorùbáland. Their history get autonomous segmentary governance, special spiritual institutions wey dey center around territorial deities, and long resistance against nineteenth-century northern military imperialism.
Historically, as dem face heavy slave raiding and tax collection from the Nupe Bida Emirate during the nineteenth century, the Yàgbà organize resistance through the Mọkọbọn wars before British colonial rule and Christian missionary penetration start. For language matter, the Yàgbà dialect maintain unique phonological, morphological, and syntactic patterns, including an ancient seven-vowel inventory, specialized focus markers, and strict syntactic rules on pronominal resumption.
Territory and Settlement Geography
Yàgbà territory dey inside one strategic geographic zone within the Niger-Benue confluence basin, wey form the western and central core of the broader Okun-Yorùbá cultural area [S1][S2]. For modern Nigerian administrative geography, the subgroup dey predominantly located across three Local Government Areas wey join body for Kogi State: Yagba West, Yagba East, and Mopa-Muro [S1]. The territory still extend pass administrative boundaries enter nearby border communities for Kwara State and Ekiti State, wey show the pre-colonial settlement patterns wey dey before twentieth-century regional demarcations [S1].
[ Niger-Benue Confluence Basin ]
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+-----------------------------+-----------------------------+
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[ Yagba West ] [ Yagba East ] [ Mopa-Muro ]
- Òdò-Ẹrẹ (Akata-Ere) - Ìsánlú (Regional Center) - Mọ́pà
- Ẹgbẹ́ (SIM Station/Hub) - Pọ́nyàn - Lineage mini-states
- Ẹjìbà - Ifẹ̀-Olúkọ̀tún
The settlement pattern of the Yàgbà comprise historic towns, nucleated farming villages, and lineage settlements wey dey among granitic inselbergs and forested lowlands. Prominent historical, political, and commercial centers include:
- Ìsánlú: As e serve as the historical administrative and political headquarters of East Yàgbà, Ìsánlú get confederated settlement clusters wey historically coordinate regional defense and diplomatic representation [S1].
- Ẹgbẹ́: As e dey for West Yàgbà near Kwara State boundary, Ẹgbẹ́ develop as one important commercial crossroad and later become the main regional center for Western educational and medical infrastructure for the early twentieth century [S1][S5].
- Òdò-Ẹrẹ (Akata-Ere): Dem dey respect am for western oral traditions as foundational site of settlement and political authority, wey carry the lineage seat of the Elérẹ̀ [S1][S3].
- Mọ́pà: One important urban and cultural center wey dey inside the Mopa-Muro administrative zone, wey stand for one distinct confederation within the Yàgbà cultural sphere [S1].
- Ẹjìbà: One major farming and commercial center wey dey along the riverine lowlands of West Yàgbà [S1].
- Pọ́nyàn: One prominent East Yàgbà settlement wey dey distinguished by how e maintain indigenous ritual cycles, farming festivals, and age-grade assemblies strictly [S1][S9].
- Ifẹ̀-Olúkọ̀tún: One historic southern community wey dey at the intersection of Yàgbà and neighboring Èkìtì cultural zones, wey the priestly leadership of the Olúkọ̀tún dey traditionally govern [S1][S5].
Origins and Historiographical Debates
The historiography of Yàgbà origins dey defined by different competing paradigms: local oral etymologies, migration traditions wey connect to western Yorùbá core centers, and archaeological-historical models wey show say dem be local autochthons within the Niger-Benue confluence.
[ Historiographical Models of Yàgbà Origins ]
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+---------------------+---------------------+
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[ External Migration ] [ Deep Autochthony ]
- Oyo/Ife Dynastic Links - Confluence Continuity
- "Ìyá Àgbà" / Princess tradition - Autonomous evolution
- Sourced: Kenyo (1959) - Sourced: Obayemi (1976, 1980)
Oral Traditions and Etymological Narratives
Yàgbà communal memory record two prominent etymological traditions wey explain the origin of the name Yàgbà.
The first tradition trace the founding of the subgroup to one prominent female leader, wey genealogical recitations identify as an Ọ̀yọ́ princess, wey lead one group of migrants from the western Yorùbá savannah enter the Niger-Benue confluence basin [S3]. When she reach the territory, she set up her primary court for Akata-Ere [S3]. Because she be elderly matriarch, dem call the community Ìlú Ìyá Àgbà (the town of the Old Woman/Matriarch), wey contract phonetically across generations come turn Yàgbà [S3].
The second tradition bring the ethnonym from one story of displacement about an early emissary or settler wey dem send from Ilé-Ifẹ̀ [S3]. According to this account, rival migrant groups beat the leader for game and e lose legitimate title to the surrounding fertile lands [S3]. For his lamentation before the paramount council, e cry out say e no get elder support.
Translation Layer: The Founding Lament
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Original Spoken Line:
Ìyà àgbà ló jẹ mị́.
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Literal Meaning:
Ìyà (Suffer/punishment) àgbà (of elders / say elder guidance no dey) ló (na wetin) jẹ (affect/chop) mị́ (me).
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Idiomatic English:
"Na because elder guidance no dey na im make dis suffer happen to me." (Tori say na traditional proverb; translation from corpus [confidence: medium])
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Wetin e mean:
Dis phrase dey show say when person or group wey dey travel cut commot from their family lineage and elder support, e dey make dem open to serious disadvantage and make people collect their property.
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Wetin dem dey use am for:
For society, dis story dey serve as origin story to explain how group take get their name, and e dey serve as warning say make community no start big project without the solid support of senior elders from the lineage.
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Where dem dey use am:
Dem dey recite am for traditional council meetings and when dem dey perform oral history about how Yàgbà family lines take scatter across the confluence hills.
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Importance and value:
Dis phrase dey strengthen the structural authority wey elders (àgbà) get to protect communal property rights and security of their land.
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Different ways dem dey talk am:
Different dialect record the phrase as Ìyà àgbà ló jemí, where dem change the standard first-person object marker put the northeastern variant mí/jemí [S3].
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Tone pattern:
The low tone for Ìyà (L-L) show sharp difference with the low-high pattern for àgbà (L-H), and e dey create one rhythm wey dey emphasize how heavy the suffering (ìyà) heavy because elders no dey.
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Notes on top the translation:
The verb jẹ directly mean "to chop" or "to consume," but for deep meaning and legal language, e dey mean say trouble or suffer meet person, or say outside condition make person suffer.
The Debate About Autochthony versus Migration
Academic historians no agree on whether dis migration stories na real history. Even though popular local traditions and writers from early twentieth century like E. A. Kenyo connect Yàgbà origin to royal migration from Ilé-Ifẹ̀ or Old Ọ̀yọ́ [S3], academic research wey Ade Obayemi lead dey challenge dis dynastic diffusionist model [S2][S5].
Dispersal Center Divergence:
* Western Yàgbà Traditions ---> Point to Akata-Ere (Òdò-Ẹrẹ)
* Eastern Yàgbà Traditions ---> Point to Ìlái / Awoyò
Obayemi show say Okun-Yorùbá populations, including the Yàgbà, na people wey don naturally develop inside the Niger-Benue confluence zone for more than one thousand years [S2][S5]. Continuity for language and archaeology dey suggest say Yàgbà communities develop their own distinct political, ceramic, and religious traditions on their own, without depending on the centralized royal dynasties of the southwestern forest zones [S5].
Apart from dat, history record different internal division about the main place wey dem scatter from: western Yàgbà groups identify Akata-Ere as the original place wey dem scatter from, while eastern Yàgbà settlements trace their ancestral dispersal go Ìlái and Awoyò [S4]. Wetin academic scholars generally agree on be say modern Yàgbà society form through how ancient autochthonous populations and different sets of regional migrants come together over time [S2][S4].
The Nineteenth Century, Nupe Hegemony, and the Mọkọbọn Wars
The nineteenth century na period wey bring big change and destruction for Yàgbà history, because of how Nupe kingdom expand their empire after dem establish the Bida Emirate [S2][S6].
[ Bida Emirate Expansion (c. 1850-1897) ]
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+-------------------------+-------------------------+
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[ Economic Exploitation ] [ Armed Resistance ]
- Tribute extraction via *Ogba* - Hilltop defense alliances
- Massive slave raiding - The Mọkọbọn Resistance
- Textile/Agricultural expropriation - Sourced: Apata (1986, 1998)
From 1850s, Bida military forces wey Nupe royal leaders like Masaba and Umaru Majigi dey lead start organized military attack enter northeast Yorùbáland [S6][S7]. As Yàgbà mini-states no get one central government, e make the different settlements dey vulnerable to the horse soldiers and firearms of Bida [S5][S6].
The Ogba System and Fiscal Extraction
After dem conquer or control Yàgbà settlements, Bida Emirate set up indirect tax administration using imperial agents wey dey live there, wey dem dey call Ogba [S6]. Dem put dis agents for major Yàgbà communities make dem monitor and force people to pay regular tribute (jizya and levies), wey include:
- Slaves, especially young people wey dem capture and family dependents [S6].
- Farm produce, including yam, grains, and livestock [S6].
- Local textiles, especially prestigious handwoven cloth like aṣọ ìpò [S7].
The Ogba get plenty administrative power, and dem dey always seize people property by force, kidnap people as hostage, and carry out military attack whenever tribute payment delay [S6]. Dis tax system spoil local farming well well, make people run commot from fertile valleys, and force communities to relocate go hilltop fortresses and granite rocks wey dem fit defend [S6][S7].
The Mọkọbọn Resistance Movement
Because of dis continuous extraction, Yàgbà people organize one joint regional uprising wey dem know as the Mọkọbọn war [S6]. The word Mọkọbọn come from the regional slogan and military pledge:
Mọ́ kọ̀ bọ́n ("I refuse [Nupe] bondage" / "We reject servitude") [S6].
The Mọkọbọn movement unite different Yàgbà mini-states, family heads, and warrior groups into one coordinated military alliance [S6]. As dem use guerilla tactics, fortified mountain settlements, and ambush attacks for local areas, the Yàgbà coalition block Bida supply lines and kill several wicked Ogba agents [S6].
Even though the Royal Niger Company military expedition of 1897 come later break the formal power of the Bida Emirate, the Mọkọbọn resistance still remain one major historical example of joint struggle against imperialism across northeast Yorùbáland before dem formally set up the Northern Nigeria Protectorate [S6].
Political Institutions and Social Organization
As e dey different from the centralized kingdom-dem of central and western Yorùbá (like Ọ̀yọ́, Ìjẹ̀bú, or the Èkìtì kingdoms), pre-colonial Yàgbà society dey organized into autonomous, segmentary village group-dem wey historians categorize as "mini-states" [S5][S8]
[ Segmentary Governance Architecture ]
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+---------------------------+---------------------------+
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[ Lineage Councils ] [ Priestly Chieftaincies ] [ Age-Grade System ]
- *Àgbà Ìlú* - *Elérẹ̀ of Ẹrẹ* - Labor mobilization
- Consensual law - *Elégbẹ́ of Ẹgbẹ́* - Civic defense
- Dispute mediation - *Olúkọ̀tún of Ifẹ̀* - Ritual policing
The Mini-State Structure
Dem build Yàgbà political structure on top patrilineage (ẹbí or ìdílé) and the village council [S5]. Autonomous settlement-dem manage their internal matter without subjection to single paramount monarch (ọba) [S5]. Governance work through council of lineage elder-dem (àgbà ìlú), wey settle dispute, share communal farmland, and negotiate alliance through consensus [S5][S8].
Na localized priestly-political chief-dem dey mostly get leadership authority, wey come from their role as custodian of ancestral shrine-dem, earth deity-dem, and territorial boundary-dem [S5]. The prominent ones among these title-dem include:
- The Elérẹ̀ of Òdò-Ẹrẹ: The hereditary custodian of the foundational Akata-Ere territory [S1][S5].
- The Elégbẹ́ of Ẹgbẹ́: The presiding lineage head and ritual leader of the Ẹgbẹ́ confederation [S1][S5].
- The Olúkọ̀tún of Ifẹ̀-Olúkọ̀tún: One senior sacerdotal title wey dey exercise ritual authority over southern Yàgbà border territory-dem [S1][S5].
Executive decision-dem need broad consultation across lineage line-dem, to make sure say power no turn autocratic and say e spread across the different branch-dem of the community [S5][S8].
The Age-Grade System
Institutionalized age-grade organization follow cut across the segmentary lineage system [S5]. Dem organize male cohort-dem into distinct developmental grade-dem wey dey responsible for specific civic, economic, and military duty-dem:
- Junior Age Grades: Dem dey in charge of communal public work, clearing farm road-dem, maintaining public shrine-dem, and market sanitation [S5].
- Warrior Age Grades: Responsible for community defense, tracking outside raider-dem, executing retaliatory raid-dem, and enforcing council directive-dem during emergency [S5][S6].
- Elder Age Grades: Dem no dey do manual labor and active combat, so dat dem go fit serve as judicial arbiter-dem, store of historical knowledge, and religious advisor-dem [S5][S8].
Material Culture and the Aṣọ Ìpò Textile Tradition
Yàgbà material culture reach high level of technical sophistication for textile production, especially for the weaving of aṣọ ìpò [S7].
Aṣọ ìpò na heavy, indigenous red-dyed woven textile wey dem make with traditional vertical and horizontal loom-dem [S7]. As people value am well-well across northeast Yorùbáland and Nupe and Hausa trader-dem dey find am, aṣọ ìpò serve important social and ritual function-dem [S7]:
- Mortuary Rites: E dey serve as the compulsory burial cloth for titled elder-dem, lineage head-dem, and rich people, to symbolize ancestral transition and genealogical continuity [S7].
- Masquerade Regalia: E dey form the sacred visual base for elite ancestral masquerade costume-dem (egúngún) [S7].
- Social Capital: E dey function as store of value, high-prestige dowry payment, and diplomatic gift between confederated community-dem [S7].
Religious Systems, Deities, and Festivals
Traditional Yàgbà religious practice dey characterized by the primacy of localized earth and territorial spirit-dem (ẹbọra), structured ancestral veneration, and specialized gender-based ritual association-dem [S5][S9].
[ Yàgbà Religious Matrix ]
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+------------------------+------------------------+
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[ The *Ẹbọra* Complex ] [ Gender Cults ] [ Agricultural Cycles ]
- Mountain/River Spirits - *Ọ̀fọ̀sì* (Women) - *Alatee* Festival
- Primary ritual locus - *Egúngún* / *Epà* - First-yam sanctification
- Sourced: Obayemi (1976) - Sourced: Apata (2011) - Sourced: Apata (2011)
The Primacy of Ẹbọra
Although dem recognize generalized Yorùbá òrìṣà like Ògún (the deity of iron and metallurgy) and Ṣàngó (the deity of thunder), alongside Ifá divination (wey dem dey call Ihá locally) across Yàgbàland, historical religious devotion center mostly on ẹbọra [S5].
Ẹbọra na localized territorial deity-dem and nature spirit-dem wey dem believe say dey live inside specific topography-dem: granite inselberg-dem, mountain cave-dem, sacred grove-dem, and river-dem [S5]. Unlike pan-Yorùbá òrìṣà wey get anthropomorphic mythological biography-dem, ẹbọra dey tied to the local ecology [S5]. Dem dey serve as protector-dem for specific settlement-dem, arbiter-dem for land boundary-dem, and guarantor-dem for farm fertility [S5].
Lineage priest-dem dey make seasonal sacrifice of yam, palm oil, and livestock for ẹbọra shrine-dem to maintain environmental balance and prevent epidemic disease-dem [S5].
Women's Ritual Authority: The Ọ̀fọ̀sì Society
As men hold authority over ancestral masquerade society-dem (egúngún), Yàgbà women dey exercise spiritual and juridical power through the Ọ̀fọ̀sì society [S9].
Di Ọ̀fọ̀sì na one religious order for women wey get proper structure, wey dey responsible to maintain spiritual balance for di community, do seasonal cleansing rituals, and check di excess power of male leaders [S9]. People wey dem initiate dey go through special training for secret chanting styles, agbo (herbal medicine) knowledge, and restorative ritual songs [S9]. During times of community crisis, drought, or political dispute, di Ọ̀fọ̀sì dey gather for night to perform propitiatory rites wey di whole community must obey, and dis one dey show how dem share ritual power between genders according to institutional structure [S9].
Masquerade Traditions: Egúngún and Epà
Ancestral veneration for Yàgbà communities show physically through masquerade institutions [S5][S8]:
- Egún / Egúngún: Ancestral masquerades wey represent ancestors wey don die from di family lineage. As dem dey appear during yearly dry-season celebrations and burial rites, di egúngún serve as spiritual link between living descendants and ancestral lineages, dey enforce social morality and settle disputes between lineages wey people never resolve [S5][S8].
- Epà Helmet-Mask Displays: For southern and eastern Yàgbà border areas, masquerades wey connect to di Epà cycle dey display big carved wooden helmet masks wey carry elaborate decorative figures on top, wey dey celebrate physical strength, maternity, and hunting skill [S5][S8].
Di Alatee Festival and Yam Sanctification
Di economic and ritual life of di Yàgbà people depend on di farming calendar, especially di planting and harvesting of white yam (Iṣu) [S9]. For communities like Pọ́nyàn for East Yàgbà, di yearly Alatee festival serve as di compulsory ritual arrangement to sanctify di new harvest [S9].
Under strict customary law, no member of di community get permission to harvest, sell, or chop new yam until di Alatee priests do di first preliminary rites [S9]. Dis rites involve to dedicate di first harvested tubers to local ẹbọra shrines and lineage ancestors to give thanks for rainfall and fertile soil [S9]. Public consumption of new yam dey only start after dem don fulfill dis spiritual obligations, wey help keep communal unity and prevent people from finishing farm crops before time [S9].
Dialectology and Linguistic Architecture
For language classification, di Yàgbà speech variety belong to di North-East Yorùbá (NEY) group under di Yorùboid branch of di Niger-Congo language family, wey dem classify inside di wider Okun cluster [S10][S11].
[ Yorùboid Linguistic Phylum ]
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[ North-East Yorùbá (NEY) Branch ]
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[ Okun Cluster ]
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[ Yàgbà Dialect Area ]
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+---------------------+---------------------+
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[ Phonological System ] [ Syntactic Transformations ]
- 7 Oral / 3 Nasal Vowels - Verb movement with *rí / rín*
- Partial mid-vowel ATR - Obligatory Resumptive Pronouns
- Ban on noun-initial /u/ - Lexical: *olùkù*, *apo*
- Intervocalic retention - Sourced: Umaru & Adegboye (2025)
- Sourced: Capo (1985)
Phonology and Vowel Inventory
Di sound structure of Yàgbà different well-well from Central Yorùbá dialects (like Èkìtì, Ìjẹ̀ṣà, and Ifẹ̀) and Standard Yorùbá (SY) [S10][S12]:
- Seven Oral Vowels: Unlike Central Yorùbá varieties wey dey maintain nine-vowel system (/i, ɪ, e, ɛ, a, ɔ, o, ʊ, u/) with pervasive cross-height Advanced Tongue Root [ATR] vowel harmony, Yàgbà dey operate standard seven-oral-vowel inventory:
$${/i/, /e/, /\varepsilon/, /a/, /\supset/, /o/, /u/}$$
alongside smaller system of three nasal vowels:
$${/\tilde{i}/, /\tilde{\supset}/, /\tilde{a}/}$$ [S12].
- Partial Vowel Harmony: Cross-height ATR harmony no dey; vowel harmony dey operate partially and e dey restricted to di mid-vowel series, dey harmonize /e, o/ with /ɛ, ɔ/ across root morphemes [S12].
- Prohibition of Word-Initial /u/: In contrast to Central and South-East Yorùbá (SEY) dialects where words dey frequently start with di high back vowel /u/ (for example, orúkọ wey dey appear as urúkọ or ùfẹ́), Yàgbà strictly forbid make noun start with /u/, and for dis specific parameter e follow North-West Yorùbá (NWY) [S12].
- Intervocalic Consonant Preservation: Yàgbà dey resist systemic dropping of consonants wey dey between vowels (like di loss of /w/, /r/, or /h/) wey people commonly observe for everyday spoken Standard Yorùbá [S10].
Di Scholarly Debate on Noun-Initial High Tones
One major debate for Yorùbá comparative dialectology focus on whether Yàgbà dey allow high tones on di first vowels of nouns.
[ Debate: Noun-Initial High Tones in Yàgbà ]
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+----------------------+----------------------+
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[ Oladeji's Position (2017) ] [ Comparative Dialectologists ]
- Initial High Tones Permitted - General Constraint Holds
- Examples: *ówo* (money), - Initial vowels restricted to
*óluku* (friend) Low (L) or Mid (M) tones
- Tone-bearing prefix retained - Rejects initial High tones
- Wetin Oladeji Talk: K. O. Oladeji talk say Yàgbà dey break di general Yorùbá tone rule wey say make vowel wey dey start noun get only Low or Mid tone [S13]. Oladeji bring word examples like ówo ("money"; SY: owó) and óluku ("friend"; SY: ọ̀rẹ́), dey argue say Yàgbà dey allow High tone on top prefix wey dey start word [S13].
- Di Opposite Position from Comparative Linguistics: But di comparative dialectologist dem wey analyze voice recording of old people wey dey flow well and dey speak only di language argue say, dis high-tone form dem wey people dey see, na from secondary morphosyntactic contraction (like associative clitic wey drop or focus affix) e come, no be from di real root of di noun [S10][S12]. Dem maintain say deep down, Yàgbà noun dey strictly follow di Common Yorùbá rule wey forbid High tone for di beginning of root [S12].
Recent generative syntactic analysis show say Yàgbà get distinct transformation rule dem wen focus construction and WH-movement dey happen [S14].
- Di Focus Particle rí / rín: For marked focus structure and object-demoting transformation dem, Yàgbà dey use verb movement wey di regional focus particle rí or rín dey show to make di topic stand out well-well for tok, wey different from di standard Yorùbá focus marker ni [S14].
- Resumptive Pronoun Wey Must Dey: For left-dislocation and WH-extraction structure dem wey concern subject or object argument, Yàgbà grammar strictly require make overt resumptive pronoun dey for di extraction site [S14]. Even though Standard Yorùbá dey allow null pronominal trace for di same kind syntactic environment, Yàgbà no dey allow empty category for dis position dem [S14].
Lexical Comparison Dem
Di Yàgbà vocabulary still keep old Yorùboid word dem and special regional term dem wey different from di Standard Yorùbá equivalent dem [S10][S14]:
| Meaning | Yàgbà Form | Standard Yorùbá (SY) | Dialectological Note Dem |
|---|
| Friend | olùkù | ọ̀rẹ́ | E still dey across Okun dialect dem; e connect to old Yorùboid root dem [S10]. |
| Pepper | apo | ata | Common regional variant for Niger-Benue confluence [S10]. |
| Divination | Ihá | Ifá | Phonetic shift $/f/ \to /h/$ wey common for northeastern speech [S5]. |
Late nineteenth and early twentieth century bring big socio-religious transformation dem come Yàgbàland, wey end of Nupe war dem, British colonial boundary adjustment dem, and di coming of Christian missionary organization dem cause [S1][S5].
[ 20th Century Socio-Religious Shifts ]
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+-------------------------+-------------------------+
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[ The Sudan Interior Mission ] [ Colonial Reorganization ]
- Establishment at Ẹgbẹ́ (c. 1908) - Incorporation into Northern Region
- Hospital and educational hub - Administrative division from
- Rapid displacement of indigenous shrines Western Yorùbá provinces
- Sourced: Obayemi (1980) - Sourced: Iyekolo (2000)
Sudan Interior Mission (SIM) for Ẹgbẹ́
From di first ten years of di twentieth century, di Sudan Interior Mission (SIM), wey be evangelical missionary organization, set up dia main regional operational base for Ẹgbẹ́ [S5]. Di mission establish major school dem and develop di Egbe Hospital, wey grow become one of di most prominent hospital for central Nigeria [S5].
Di evangelical campaign dem of di mission make many Yàgbà people convert go Christianity [S5]. Dis quick change make dem scatter local ẹbọra shrine dem, leave many seasonal farming ritual dem, and make secret society dem like Ọ̀fọ̀sì go down [S5][S9].
Wetin History Book Dem Keep Quiet About and Gap Dem for Research
Academic document dem about Yàgbà history get several silence wey people know about:
- Chronology Before Nineteenth Century: Because archaeological digging for Yagba West and East region still limited wen dem compare am to Ilé-Ifẹ̀ or Ọ̀yọ́-Ilé, di material chronology of early settlement formation, ceramic history, and metalwork development before 1800 rely mostly on unstratified oral tradition dem [S2][S4].
- Small-Small Difference Inside Di Dialect: Even though general difference between Okun and Central Yorùbá don dey clear, detailed tone and phonetic map dem wey document di small-small difference between West Yàgbà (e.g., Ẹgbẹ́, Òdò-Ẹrẹ) and East Yàgbà (e.g., Ìsánlú, Pọ́nyàn) still never complete for di published linguistic book dem [S10][S14].
- Liturgical Text Dem: Nupe war pressure for nineteenth century and Christian mission work for twentieth century both affect Yàgbà religious practice [S5][S9]. Wetin lost from indigenous religious text dem for di process, di Ihá divination verse dem and ẹbọra praise poetry wey dem no record, person no fit rebuild dem from wetin dey published.
Source-dem [S1] E. Iyekolo, A History of Yagba People (Lagos: Nelson Publishers, 2000), pp. 12–45. [S2] Ade Obayemi, "The Sokoto Jihad and the 'O-kun' Yoruba: A Review," Journal of the Historical Society of Nigeria, Vol. 9, No. 2 (1978), pp. 61–87. [S3] E. A. Kenyo, Founders of the Yoruba Nation (Lagos: Yoruba Historical Research Company, 1959), pp. 28–34. [S4] Ann O’Hear, "The History of the Okun Yorùbá: Research Directions," inside Toyin Falola and Ann Genova (eds.), Yorùbá Identity and Power Politics (Rochester, NY: University of Rochester Press, 2006). [S5] Ade Obayemi, "States and Peoples of the Niger-Benue Confluence Area," inside Obaro Ikime (ed.), Groundwork of Nigerian History (Ibadan: Heinemann Educational Books, 1980), pp. 144–164. [S6] Z. O. Apata, "The Nupe Hegemony and Its Impact on Northeast Yorubaland 1850–1900," African Notes, Vol. 10, No. 1 (1986), pp. 21–30. [S7] Z. O. Apata, The Nupe Hegemony and Its Impact on Northeast Yorubaland: 1850–1900 (Ilorin: University of Ilorin Press, 1998), pp. 55–78. [S8] P. C. Lloyd, "Sacred Kingship and Government among the Yoruba," Africa: Journal of the International African Institute, Vol. 30, No. 3 (1960), pp. 221–237. [S9] Ayodeji Olukoju, Z. O. Apata, and Olayemi Akinwumi (eds.), Northeast Yorubaland: Studies in the History and Culture of a Frontier Zone (Ibadan: Rex Charles Publication, 2003), pp. 88–114. [S10] Abiodun Adetugbo, The Yoruba Language in Western Nigeria: Its Major Dialect Areas (Ph.D. dissertation, Columbia University, 1967), pp. 134–156. [S11] Olufẹ́mi Akinkugbe, "An Internal Classification of the Yoruboid Group," Journal of West African Languages, Vol. 11, No. 1–2 (1976), pp. 1–19. [S12] Hounkpati B. C. Capo, "On the High Non-Expanded Vowels in Yoruboid," Studies in African Linguistics, Vol. 16, No. 1 (1985), pp. 103–121. [S13] K. O. Oladeji, "Vowel assimilation in monosyllabic verb + noun construction in yoruba revisited," European Journal of Language Studies, Vol. 4, No. 1 (2017), pp. 38–47. [S14] Jacob Yakubu Umaru and Oluseye Olusegun Adegboye, "A Description of Syntactic Transformations in Yàgbà," Abuja Journal of Humanities, Vol. 6, No. 2 (2025), pp. 414–431. https://doi.org/10.70118/TAJH0035