Twenty and five years old: As Ahaz was 20 years old when he began to reign, and died when he had reigned 16 years, his whole age only amounted to 36 years; and as Hezekiah was, at least, entering on his 25th year when he began to reign, then Ahaz must have been under 12 years of age when his son was born! This is not at all impossible, and there are well-attested facts of men having children at as early a period, especially in eastern countries., am 3278-3306, bc 726-698
Abi: 2 Chronicles 29:1, Abijah