Eritrean independence movement leaders families where not in Xamar but in the gulf states Sudan and Egypt where there was large Eritrean diaspora community living in those Arab states.Most of their elites and their kids were in xamar because they were separatist.
Most people from the North & East would not know much about Eritreans, but those in Xamar would. Keep in mind, in the old days, most Eritreans in the Gulf States used to travel with Somali passport.Of course we know OF them.But Somalis don't know Eritreans.