תלמוד על מלכים א 13:2

Why were the names of Abraham and Jacob changed but Isaac’s name was not changed? The former were given their names by their fathers; but Isaac was called Isaac by the Holy One, Praise to His Name, as it is said (Gen. 17:19) “You shall call his name Isaac”. Four were given names before they were born, and they are Isaac, Ismael, Josiah, and Solomon. Isaac, (Gen. 17:19) “You shall call his name Isaac”. Ismael as it is written (Gen. 16:11): “You shall call his name Ismael”. Josiah, (1Kings 13:2): “Behold, a son will be born to the dynasty of David; his name will be Josiah”. Solomon, (1Chr. 22:9) “Solomon will be his name”³¹⁰While in 2Sam. 12:24–25 it seems that David gave the name Solomon to his son and Nathan called him Yedidiah after his birth; it is clear from Chronicles that the name Solomon was not David’s invention but prophetically pre-ordained.. All this for the just. But the wicked (Ps. 58:4) “The wicked are perverted from the womb.”

HALAKHAH: “One who makes a vow away from those who will be born,” etc. What is Rebbi Meïr’s reason? “And now your two sons born to you¹⁴³Gen. 48:5.”, and they already were born. What is the Sages’ reason? “Lo, a son is born to the House of David, Josiah his name,¹⁴⁴1K. 13:2.” and he was not yet born.