2 Kings 24:8-16
Jehoiachin was eighteen years old when he began to reign, and he reigned in Jerusalem three months. And his mother's name was Nehushta, the daughter of Elnathan of Jerusalem.
Torrey's Topical Textbook—AKJV

2 Chronicles 36:9,10
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 the LORD.
Torrey's Topical Textbook—AKJV