A Roman governor of the fourth part of a province; hence, any subordinate or dependent prince; also, a petty king or sovereign.

Name given to a territorial ruler who functioned essentially as a client king for an emperor. The territory under a tetrarch's control was often defined by political division rather that by ethnicity or ancestral heritage.

Mt. 14:1; Lk 3:1; Lk 3:19; Lk 9:7; Acts 13:1] A Roman governor of the fourth part of a province; a subordinate prince. In time, this word came to denote any petty king or sovreigh.

a Greek term that strictly identifies one of four governors of a divided province

The rule, subordinate prince or governor of a province under Rome.