δυνάστης G1413
dynástēs · doo-nas'-tace · Noun Masculine
from δύναμαι; a ruler or officer:--of great authority, mighty, potentate.
3 Occurrences in the King James Bible
Luke 1:52He hath put down the mighty from their seats, and exalted them of low degree.
Acts 8:27And he arose and went: and, behold, a man of Ethiopia, an eunuch of great authority under Candace queen of the Ethiopians, who had the charge of all her treasure, and had come to Jerusalem for to worship,
1 Timothy 6:15Which in his times he shall shew, who is the blessed and only Potentate, the King of kings, and Lord of lords;