'Leader' in the Bible

I turned it over to the leader of those nations, who dealt with it thoroughly. I have driven it away because of its wickedness.

They will live in the land that I gave to my servant Jacob and on which your ancestors lived. They will live in that land, along with their children and grandchildren, forever. David my servant will be their everlasting leader.

"Son of Man, turn your attention toward Gog, from the land of Magog, leader of the head of Meshech, and of Tubal. Prophesy this against him:

"This is what the Lord GOD says: "Watch out! I'm coming after you, Gog, leader of the head of Meshech, and of Tubal.

"Now as for you, Son of Man, prophesy against Gog and tell him, "This is what the Lord GOD has to say: "Watch out, Gog, you leader of the head of Meshech and of Tubal!