Manasseh was twelve years old when he began to reign; and he reigned fifty-five years in Jerusalem.
TSK
TSK · Isaiah 3:4
Treasury of Scripture Knowledge references in WEB.
Joahaz was twenty-three years old when he began to reign; and he reigned three months in Jerusalem.
Jehoiachin was eight years old when he began to reign; and he reigned three months and ten days in Jerusalem: and he did that which was evil in the sight of Yahweh.
Woe to you, land, when your king is a child, and your princes eat in the morning!