Orma descend from Oromo herders who moved south contested
also in The Oromo pastoralists of the north: Gabra, Sakuye and Orma
The Orma are the southernmost branch of the Oromo, descended from Borana groups who moved south from the Ethiopian highlands with their cattle. Oral history traces them to a sub-group that broke into the related Orma, Wardei and Munyo identities during the migration. They are a Muslim, cattle-keeping people who settled along the Tana River. The details and dating of this migration are debated.