History of Adal Sultanate and Ifat

The rulers of the earlier Sultanate of Shewa and the Walashma princes of Ifat and Adal all possessed Arab genealogical traditions. During Adal's initial period, when it was centered on the port city of Zeila in present-day northwestern Somalia, the kingdom was primarily composed of Somalis, Afars and Arabs.

There is some debate over the ethnic composition of Adal after its capital moved to modern-day Ethiopia. I.M Lewis states:
Somali forces contributed much to the Imām’s victories. Shihab ad-Din, the Muslim chronicler of the period, writing between 1540 and 1560, mentions them frequently (Futūḥ al-Ḥabasha, ed. And trs. R. Besset Paris, 1897.). The most prominent Somali groups in the campaigns were the Samaroon or Gadabursi (Dir), Geri, Marrehān, and Harti - all Dārod clans. Shihāb d-Dīn is very vague as to their distribution and grazing areas, but describes the Harti as at the time in possession of the ancient eastern port of Mait. Of the Isāq only the Habar Magādle clan seem to have been involved and their distribution is not recorded. Finally several Dir clans also took part.[13]

This finding is supported in the more recent Oxford History of Islam:
The sultanate of Adal, which emerged as the major Muslim principality from 1420 to 1560, seems to have recruited its military force mainly from among the Somalis.

Lewis, on the other hand, notes that the Imam's origins are unknown.[15] Ewald Wagner connects the name ʿAdäl with the Dankali (Afar) tribe Aḏaʿila and the Somali name for the clan Oda ʿAlï, proposing that the kingdom may have largely been composed of Afars.[16] Although Afars constituted a significant part of Adal, Didier Morin notes that "the exact influence of the ʿAfar inside the Kingdom of `Adal is still conjectural due to its multi-ethnic basis."[16] Nevertheless, Franz-Christoph Muth identifies Ahmad ibn Ibrihim al-Ghazi as Somali......End