'Chief' in the Bible

So Abimelech was chief over Israel for three years.

And they said to Jephthah, Come and be our chief so that we may make war against the children of Ammon.

So Jephthah went with the responsible men of Gilead, and the people made him head and chief over them; and Jephthah said all these things before the Lord in Mizpah.

And when he saw her he was overcome with grief, and said, Ah! my daughter! I am crushed with sorrow, and it is you who are the chief cause of my trouble; for I have made an oath to the Lord and I may not take it back.