The Eesa, probably the most powerful branch of the Somali nation, extends northwards to the Wayma family of the Dankali; southwards to the Gudabirsi, and midway between Zayla and Berberah; eastwards it is bounded by the sea, and westwards by the Gallas around Harar. It derives itself from Dirr and Aydur, without, however, knowing aught beyond the ancestral names, and is twitted with paganism by its enemies.Cited from First footsteps in East Africa,byRichard F. Burton
The number is said to be small, amounting to about 100 families in the northern Somali country.
The Tomal or Handad, the blacksmiths, originally of Aydur race, have become vile by intermarriage with serviles.Cited from First footsteps in East Africa,byRichard F. Burton
The old and pagan genealogies still known to the Somal, are Dirr, Aydur, Darud, and, according to some, Hawiyah.Cited from First footsteps in East Africa,byRichard F. Burton
According to some, Dirr was the father of Aydur; others make Dirr (it has been written Tir and Durr) to have been the name of the Galla family into which Shaykh Ishak married.Cited from First footsteps in East Africa,byRichard F. Burton
Cruttenden applies the term Edoor (Aydur) to the descendants of Ishak, the children of Gerhajis, Awal, and Jailah.Cited from First footsteps in East Africa,byRichard F. Burton
The Gudabirsi, or Gudabursi, derive themselves from Dir and Aydur, thus claiming affinity with the Eesa: others declare their tribe to be an offshoot from the Bahgoba clan of the Habr Awal, originally settled near Jebel Almis, and Bulhar, on the sea-shore. …Cited from First footsteps in East Africa,byRichard F. Burton