Ndebele History and Culture. South African People. Ndebele authority structures were similar to those of their Zulu cousins. The authority over a tribe was vested in the tribal head (ikozi), assisted by an inner or family council(amaphakathi). Wards (izilindi) were administered by ward heads and the family groups within the wards were governed by the heads of the families. The residential unit of each family was called an umuzi The umuzi usually consisted of a family head (umnumzana) with his wife and unmarried children. If he had more than one wife, the umuzi was divided into two halves, a right and a left half, to accommodate the different wives. An umuzi sometimes grew into a more complex dwelling unit when the head's married sons and younger brothers joined the household. Every tribe consisted of a number of patrilineal clans or izibongo. This meant that every clan consisted of a group of individuals who shared the same ancestor in the paternal line.