Boyd’s Bible Dictionary:
(tribe). Title of Hebrew rulers from Saul to Zedekiah, B. C. 1095-588. Other rulers (Gen. 36:31; Ex. 3:19; Num. 31:8). Supreme ruler (1 Tim. 1:17; 6:15).
Strong’s Dictionary of Greek Words:
Transliteration:
basileus
Meaning:
probably from 939 (through the notion of a foundation of power); a sovereign (abstractly, relatively, or figuratively)