Oru

It is transitional towards the Northern Igbo and claims descent from the Riverain Egbema.

It is grouped with Orsu I and Orsu II as part C, marginal between the Isu-Ama and the Nri-Awka, and counted among the entries that may be regarded as Western Isu.

Its towns are Awomama, Uli and Omuma, then Amini, Akatta and Mbidi, with 11 further small village groups. The clan is of mixed origin: eight of its village groups trace themselves to a woman founder named Oma, said to have come from the banks of the Niger; five are said to descend from the Egbema clan of the Western Igbo (No. 21); and one comes from Okija, given as Northern Igbo No. 31. Uli is described as of mixed Oma and Egbema descent.

Alone among the Isu-Ama, the Oru hold a tradition of immigration. They describe themselves as migrants out of the Riverain country and as related to the Egbema, the Riverain group of the Western Igbo; the rest of the Isu-Ama, by contrast, are said to have no such tradition.