'King' in the Bible

They have as king over them, the angel of the abyss; his name in Hebrew is Abaddon, and in the Greek he has the name Apollyon.

And they *sang the song of Moses, the bond-servant of God, and the song of the Lamb, saying,“Great and marvelous are Your works,O Lord God, the Almighty;Righteous and true are Your ways,King of the nations!

These will wage war against the Lamb, and the Lamb will overcome them, because He is Lord of lords and King of kings, and those who are with Him are the called and chosen and faithful.”

And on His robe and on His thigh He has a name written, “KING OF KINGS, AND LORD OF LORDS.”