Garad Adan was the supreme Garaad of Geri Koombe, well documented by British explorer Richard Burton who went to East Africa and then traveled to Harar.

Garad Adan was also a political figure.He was a part of the Dervish movement led by Poet Sayid Mohammed Abdullah Hassan

Burton wrote:The greatest danger we had run was from the Garad Adan, a fact of which I was not aware till some time after my return to Berbera: he had always been plotting an avanie which, if attempted, would have cost him dear, but at the same time would certainly have proved fatal to us.Burton noted that the Karanle clan were under the protection of Garad Adan.

Despite the unmerciful persecutions of the Gallas, they gradually migrated westwards from Makhar, their original nest, now number 5000 shields, possess about 180 villages, and are accounted the power paramount.

Though friendly with the Habr Awal, the Girhi seldom descend, unless compelled by want of pasture, into the plains[3]Burton also reported that Garad Adan had been at war with the Gadabursi tribe.