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The Oromo people of East Africa are divided into two major branches: the Borana Oromo and Barento Oromo. These two major groups are in turn subdivided into an assortment of clan families. From West to East and North to South, these subgroups are listed in the sections below.
The Borana include:
The Barentu include:
Afran Qallo which refers to the 4 decedents of Qallo, who are: Oborra, Daga, Babile and Ala. [2]
There are additional subdivisions:
The Marehan is a Somali clan, which is part of one of the largest Somali clan families, the Darod.
Barento is one of the two major subgroups of the Oromo people, a Cushitic ethnic group. They live in the West Hararghe Zone, East Hararghe Zone, Arsi zone, of the Oromia Region of Ethiopia while the other subgroup named Borana Oromo inhabiting Oromia Special Zone Surrounding Addis Ababa, West Shewa Zone, West Welega Zone and Borena Zone of the Oromia Region of Ethiopia.
Galamso, is a town in West Haraghe of Oromia Region, Ethiopia, Gelemso is located in eastern Ethiopian and is far from country capital by 301 km and second way 413 km in the western periphery of the highly networked mountain chain referred to by the natives as Fugug and by geographers as the Ahmar Mountains. Most people say that it is the city of love locally [Biyyaa Jaalala]. Gelemso on 2013 EC became separate woreda in the West Hararghe Zone of the Oromia Regional State, it has a latitude and longitude of 8°49′N40°31′E. Gelemso is the origin of a variety of Jimaa called by the same name (Gelemso).
The Oromo expansions or the Oromo invasions, were a series of expansions in the 16th and 17th centuries by the Oromo. Prior to their great expansion in the 16th century, the Oromo inhabited only the area of what is now modern-day southern Ethiopia and northern Kenya. Over the centuries due to many factors, mostly the wars between the Adal Sultanate and the Ethiopian Empire would further encourage the numerous Oromo tribes to expand towards central and eastern modern Ethiopia.