Eri is said to be the original legendary cultural head of the Umu-eri groups of the Igbo people. Eri established a community in the middle of Anambrariver valley (at Eri-aka) in Aguleri where he married two wives. The first wife, Nneamak?, bore him five children. The first was Agulu, the founder of Aguleri(The ancestral head of Eri Kingdom clanss) (the Ezeora dynasty that has produced 34 kings till date in Enugwu Aguleri), the second was Menri, the founder of And / Kingdom of Nri, followed by Onugu, the founder of Igbariam and Ogbodulu, the founder of Amanuke. The fifth one was a daughter called Iguedo, who is said to have borne the founders of Nteje, and Awkuzu, Ogbunike, Umuleri, Nando and Ogboli in Onitsha. As one of the children of Eri, Menri migrated from Aguleri, which was and still is, the ancestral temple of the entire Umu-Eri (Umu-Eri and Umu-Nri). His second wife Oboli begot ?n?ja, the only son who founded the Igala Kingdom in KogiState.

Eri is the founder of the Umueri and Umunri clans, both of whom were some of the most influential and powerful dynasties of priests and diviners in Igboland and adjacent areas such as the Bini and Igala/Idoma areas.