'Principal' in the Bible

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

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 Yahweh lays waste their pasture.

Then the high priest and the principal men of the Jews informed him against Paul, and they begged him,

So on the next day, when Agrippa and Bernice had come with great pomp, and they had entered into the place of hearing with the commanding officers and principal men of the city, at the command of Festus, Paul was brought in.