Genesis 21:12

Abraham : a son of Terah; the father of Isaac; ancestor of the Jewish nation.,the son of Terah of Shem

Sarah : the wife of Abraham and the mother of Isaac,daughter of Terah; wife of Abraham

Genesis 21:17

Hagar : wife of Abraham used figuratively of her son Ishmael and his descendants,Sarah's Egyptian maid

Genesis 21:19-20

There is no Names related to this verses.