The name Isaac, which means “he laughs,” was derived from his parents’ reaction when God told Abraham that he, at 100 years old, and his wife Sarah, at the age of 90, would have a son (Genesis 17:17; 18:12). Isaac was Abraham’s second son; his first, Ishmael, was by Sarah’s maidservant, Hagar, as a result of Sarah’s impatience to give Abraham a family (Genesis 16:1-2). As soon as Isaac was weaned, Sarah insisted that Abraham send Hagar and her son away, ensuring the family inheritance would go to Isaac (Genesis 21:3-12).