Australian Indigenous people in Arnhem Land call themselves Yolngu. The Yolngu have a form of social organisation which divides all things into two groups called moieties. The two Yolngu moieties are Dhuwa and Yirritja. David Malangi belongs to the Dhuwa moiety. People of the same moiety cannot marry and certain members of moieties must be careful of close associations.
*All biographical details are taken from Wikipedia for education purposes only