Duke

Boyd’s Bible Dictionary:

(leader). Hereditary chief or sheikh of Edom ({vi 1056-1084}Gen. 36:15-43).

Concise Bible Dictionary:

A title often given in the early genealogies, signifying head of a family or of a tribe, which were called after his name ({vi 1056-1084}Gen. 36:15-43; {vi 10304-10307}1 Chron. 1:51-54).