Derived from the Latin dux, meaning “a leader;” Arabic, “a sheik.” This word is used to denote the phylarch or chief of a tribe (Gen. 36:15-43; Ex. 15:15; 1 Chr. 1:51-54).
Easton’s Bible Dictionary
Duke
Easton’s Bible Dictionary (1897), public domain. Text via Theographic Bible Metadata, CC BY-SA 4.0.