The Igboid languages constitute a branch of the Volta–Niger language family.
Williamson and Blench conclude that the Igboid languages form a "language cluster" that are somewhat mutually intelligible. Igboid languages are spoken by over 40 million people.
Names and locations Below is a list of language names, populations, and locations from Blench (2019).
Language Cluster Dialects Alternate spellings Own name for language Endonym(s) Other names (location-based) Other names for language Exonym(s) Speakers Location(s) Ịka Agbor (standard form) Ìḳá Agbor Delta State, Ika and Orhionmwon LGAs Enuani Akwukwu-Igbo, Illah, Ebu, Okpanam, Atuma, Ukala-Okpunor, Ukala-Okwute, Ogbe-Onihe, Asaba, Oko-Amakom, Oko-Anala, Okwe, Igbuzo, Ogwashi-Uku, Ubulu-Uku, Ubulu-Okiti, Ubulu-Unor, Ubulu-Ogume, Ubulu-Isiogogo, Onicha-Olona, Onicha-Ugbo, Onicha-Uku, Idumuje-Unor, Idumuje-Ugboko, Issele-Uku, Issele-Azagba... Enuani Delta State, Oshimili (North/South), Aniocha (North/South) LGAs Ikwere Northern dialets: Elele, Apanị, Ọmerelu, Ubima, Isiokpo, Ọmagwa (Ọmegwa), Ipo, Ọmudioga, Ọmuanwa, Igwuruta, Egbeda, Alụu, Ịbaa; Southern dialects: Akpọ–Mgbu–Tolu, Ọbio, Ọgbakiri, Rụmuji, Ndele, Emọhua Ikwerre Ìwhuruò`hnà 54,600 (1950 F&J);Forde, C.D. and G.I. Jones 1950. The Ibo and Ibibio speaking peoples of Southern Nigeria. Ethnographic Survey of Africa. Western Africa part III. International African Institute, London. possibly 200,000 (SIL) Rivers State, Ikwerre, Emohua, Port Harcourt and Obio–Akpor LGAs Ogbah Egnih (East Ogbah), South Ogbah, West Ogbah Ogba 22,750 (1950 F&J) Rivers State, Ahoada LGA Ẹkpẹyẹ According to clan names: Ako, Upata, Ubye, Igbuduya Ekpeye, Ekpabya (by Abua), Ekkpahia, Ekpaffia 20,000 (1953); 50,000 (1969 Clark)Clark, David J. 1969. A grammatical study of Ekpeye. University of London doctoral dissertation. Rivers State, Ahoada LGA Ụkwuanị–Aboh–Ndọnị cluster Ụkwuanị–Aboh–Ndọnị 150,000 (SIL) Delta State, Ndokwa LGA; Rivers State, Ahoada LGA Ụkwuanị Ụkwuanị–Aboh–Ndọnị Utaaba, Emu, Abbi, Obiaruku Ukwani, Ukwali, Kwale Delta State, Ndokwa LGA Aboh Ụkwuanị–Aboh–Ndọnị Eboh Delta State, Ndokwa LGA Ndọnị Ụkwuanị–Aboh–Ndọnị Rivers State, Ahoada LGAEzza-Ikwo-Izzi-Ngbolizhia cluster Ezza-Izzi-Ikwo-Ngbolizha over 4million (SIL) Ebonyi state , Benue ,Enugu Ezaa language Ezaa proper: Izo-imoha-Kpakpaji-Izzikworo ; Ukawu dialects: Amudo, Abba-omegge, Ishinkwo, Amankpuma, Amoffia, Okuzzu Ezza ézáá, 1.3million+ 2018 projection Ebonyi state ,Benue state Ado LGA and Enugu state Nkanu East LGA Izi language Izi Ebonyi state and Benue state Ikwo Ikwo Ebonyi state, Ikwo LGA Ngbolizhia Ngbo , Ezzamgbo Ebonyi state Ohaukwu LGA
See also List of Proto-Igboid reconstructions (Wiktionary)
References
Blench, Roger. 2016. A reconstruction of the phonology of proto-Igboid.