'Heads' in the Bible

'After this I was seeing, and lo, another like a leopard, and it hath four wings of a fowl on its back, and four heads hath the beast, and dominion is given to it.

and concerning the ten horns that are in its heads, and of the other that came up, and before which three have fallen, even of that horn that hath eyes, and a mouth speaking great things, and whose appearance is great above its companions.

and we have not hearkened unto Thy servants, the prophets, who have spoken in Thy name unto our kings, our heads, and our fathers, and to all the people of the land.

O Lord, to us is the shame of face, to our kings, to our heads, and to our fathers, in that we have sinned against Thee.

'And the head of the kingdom of Persia is standing over-against me twenty and one days, and lo, Michael, first of the chief heads, hath come in to help me, and I have remained there near the kings of Persia;