More on tribe: Europeans have used the word tribe either for
non-western peoples, or only in an archaic sesne/sense for
themselves, e.g. Germanic tribes, Jewish tries/tribes. Actually in
anthropology, where the term is widely used, it is actually used in
such an inconsistent fashion that it is almost hopeless e.g. Bushmen
tribes and Yourbs/Yoruba tribes could not be more different in
political organization.
Regarding the Roamn Roiim/Roman etymology the tri prefix related to
Roman, Latin and Etruscan "tribes" hence the implicatin of three, as
Rome expanded the political content of subordination was maintained
and the requirement that there were only three was lost. Yes,
administrative divisiion, but also a subvordiate "tribute" paying
division brought before a "tribunal" if they protested. Anyway,
fascinating stuff. Have a great day!