I don't know about the nigga in the OP but Garaad WiilWaal is famous.
"The name Jigjiga is said to have originated from the sound that follows an earthquake. Being a site for water wells for pastoral communities, it used to have earthquakes with aftermath vibrations that produced sounds like jig-jig-jig-jig. The city’s origin of urbanization dates back to the late 1700s; today it is the largest modern city in the Somali inhabited region under Ethiopia. Having been a farming valley and a site for valuable water wells for several clan families, oral history has it that Garaad Wiilwaal (Hersi Garaad) liberated the area from intermittent invasions by the Oromos; in a bitter and bloody war in the late 1700s and early 1800s, Garaad Wiilwaal killed the legendary horse-galloping expert named Gaal Guray, the leader of the Oromo invaders, and finally consolidated his rule in the Jigjiga Shabeelay Valley bounded by Karamadha (Karamardha is an Oromo word for “passage through the hills” denoting the demise of the Oromos in the region). To his north was another powerful Garaad, Garaad Aadan, whose rule extended up to the gates of Harar (Burton, 1855)."
http://d383x9er2dcb4o.cloudfront.ne...gjiga-past-and-present-Part-II-By-Faisal1.pdf