Ogaden

Borrowed from Somali Ogaadeen, from the clan of the same name, a subsection of the Somali Darod, which inhabit part of the region. Documented folk etymologies include Ogad, the name of a founding father, meaning clever or quick-witted, and a combination of the Harari word ūga (“road”) and Aden, a city in Yemen, supposedly connected to Harar by an ancient caravan route passing through the region.

来源：wiktionary