“Zedekiah was one and twenty years old when he began to reign, and reigned eleven years in Jerusalem.”
King James Version (KJV)
36:10 Expired - Heb. at the return of the year: at the beginning of the next year, according to the sacred account of the Hebrews, at the spring of the year, the time when kings go forth to battle, as is elsewhere said, when Nebuchadnezzar, among others, went forth to settle and enlarge his conquests. His brother - Largely so called, for this was his uncle, or his father's brother, being the son of Josiah.
36:13 By God - Who had required him to swear fealty and constant obedience to him by the true God, whom he called upon to be a witness against him if he broke his oath. So his rebellion was aggravated with perjury, and horrid contempt of God.