'King' in the Bible

They have [as] king over them the angel of the abyss, {whose name} in Hebrew [is] Abaddon, and in Greek he has the name Apollyon.

And they were singing the song of Moses, the slave of God, and the song of the Lamb, saying: "Great and marvelous [are] your works, Lord God All-Powerful; righteous and true [are] your ways, King of the ages!

These will make war with the Lamb, and the Lamb will conquer them, because he is Lord of lords and King of kings, and those with him [are] called and chosen and faithful."

And he has a name written on his outer garment and on his thigh: "King of kings and Lord of lords."