'Lieutenant' in the Bible

Then Ebed's son Gaal remarked, "Who is this Abimelech? And who is Shechem? Should we serve him? Isn't he Jerubbaal's son? Isn't Zebul his lieutenant? Serve the men of Hamor, Shechem's ancestor but why are we serving him?

Zeruiah's son Abishai, Joab's brother, was the lieutenant in charge of the platoons. He used his spear to fight and kill 300 men, gaining a reputation distinct from the Three.

Joab's brother Abishai was the lieutenant in charge of the platoons. He used his spear to fight and kill 300 men, gaining a reputation distinct from the Three.