'Leader' in the Bible

"Son of man, say to the leader of Tyre, 'Thus says the Lord Yahweh: "Because your heart was haughty, and you said, 'I [am] a god; I sit [in the] seat of [the] gods, I sit in [the] heart of [the] seas!' But you are a human, not a god, and you gave your heart to be like [the] heart of a god.

then I gave it into [the] hand of [the] leader of nations; he {dealt thoroughly} with it according to its wickedness. I drove it [out].

And I, Yahweh, I will be for them {as God}, and my servant David [will be] a leader in the midst of them. I, Yahweh, I have spoken.

And they will dwell on the land that I gave to my servant, to Jacob, {in which your ancestors dwelled}, and they will dwell on it, they and their children and the children of their children {forever}, and my servant David [will be] a leader for them {forever}.

"Son of man, set your face toward Gog of the land of Magog, the head leader of Meshech and Tubal, and prophesy against him.

And you must say, 'Thus says the Lord Yahweh: "Look! I [am] against you, Gog, the head leader of Meshach and Tubal,

"And you, son of man, prophesy against Gog, and you must say, 'Thus says the Lord Yahweh: "Look! I [am] against you Gog, the head leader of Meshech and Tubal,