Horn of Africa displays the greatest diversity, a sign often viewed to represent a geographic origin. The Horn of Africa is also the place where the haplogroup E1b1b originated from, Christopher Ehret and Shomarka Keita have suggested that the geography of the E1b1b lineage coincides with the distribution of the Afroasiatic languages. Genetic analysis done on the Afroasiatic speaking population further found that a pre-agricultural back-to-Africa migration into the Horn of Africa occurred through Egypt 23,000 years ago and it brought a non-African ancestry dubbed Ethio-Somali in the region. Together with northern Somalia, Djibouti, the Red Sea coast of Sudan and Eritrea is
Horn of Africa Yejju Oromo tribe as well as Wollo and Raya Oromo. The Sultanate of the Geledi was a Somali kingdom administered by the Gobroon dynasty, which ruled parts of the Horn of Africa during the 18th and 19th centuries. It was established by the Ajuran soldier Ibrahim Adeer, who had defeated various vassals of the Ajuran Empire and established the "House of Gobroon". The dynasty reached its apex under the successive reigns of Sultan Yusuf Mahamud Ibrahim, who successfully consolidated Gobroon power during the Bardera wars, and Sultan Ahmed Yusuf, who forced regional powers such as the Omani Empire to submit