'Princes' in the Bible

"Hear, O kings; give ear, O princes; to the LORD I will sing, I will make melody to the LORD, the God of Israel.

the princes of Is'sachar came with Deb'orah, and Is'sachar faithful to Barak; into the valley they rushed forth at his heels. Among the clans of Reuben there were great searchings of heart.

And they took the two princes of Mid'ian, Oreb and Zeeb; they killed Oreb at the rock of Oreb, and Zeeb they killed at the wine press of Zeeb, as they pursued Mid'ian; and they brought the heads of Oreb and Zeeb to Gideon beyond the Jordan.

God has given into your hands the princes of Mid'ian, Oreb and Zeeb; what have I been able to do in comparison with you?" Then their anger against him was abated, when he had said this.