'Leader' in the Bible

Seraiah son of Hilkiah, son of Meshullam, son of Zadok, son of Meraioth, son of Ahitub--the leader of the house of God--

Mattaniah son of Micah, son of Zabdi, son of Asaph, [who was] the leader to begin the thanksgiving prayer, and Bakbukiah the second of his brothers; Abda son of Shammua, son of Galal, son of Jeduthun.