'Principal' in the Bible

Wisdom is the principal thing; therefore get wisdom; Yea, with all thy getting get understanding.

Wail, ye shepherds, and cry; and wallow in ashes , ye principal of the flock; for the days of your slaughter and of your dispersions are fully come, and ye shall fall like a goodly vessel.

And the shepherds shall have no way to flee, nor the principal of the flock to escape.

A voice of the cry of the shepherds, and the wailing of the principal of the flock! for Jehovah layeth waste their pasture.

And this man'shall be our peace. When the Assyrian shall come into our land, and when he shall tread in our palaces, then shall we raise against him seven shepherds, and eight principal men.