Albert Barnes Commentary 2 Kings 23:36

"Jehoiakim was twenty and five years old when he began to reign; and he reigned eleven years in Jerusalem: and his mother`s name was Zebidah the daughter of Pedaiah of Rumah." — 2 Kings 23:36 (ASV)

Twenty-five years old - Jehoiakim was therefore two years older than his half-brother, Jehoahaz (2 Kings 23:31). See his character in 2 Kings 23:37; 2 Chronicles 36:8; Ezekiel 19:5–7; Jeremiah 22:13–17; Jeremiah 26:20–23; and Jeremiah 36.