'Chief' in the Bible

son of Abishua, son of Phinehas, son of Eleazar, son of Aaron the chief priest)

Next I selected twelve of the chief priests Sherebiah, Hashabiah, and ten of their brothers with them

Guard and protect them until you disperse them to the chief priests, the descendants of Levi, and to the family leaders of Israel at Jerusalem in the chambers of the Temple of the LORD."

So Ezra got up and made the chief priests, the descendants of Levi, and all of Israel vow to carry out everything they promised. And so they agreed.