So having the same name is akin to saying they are from the same tribe? That would make them related? By cause at least?
Tribe is everything!
Lookie this:
http://www.popline.org/docs/1680/300506.html
“Abstract:
The Afro-Arab community living along the coastal belt of Kenya and Tanganyika contains persons claiming Arab nationality by either patrilineal or matrilineal descent in whom the biological Arab strain may vary between individuals born to pure Arab parents speaking Arabic and those in whom the Arab strain is unobservable and who speak Swahili. It is not accepted that the term Swahili covers the social interrelationships between these variations. The Swahili-speaking Afro-Arabs can be adequately described as Swahili but they nevertheless wish to be regarded as Arabs by outsiders and to speak as much Arabic as they can learn...”