Genesis 22:21

22:21 Uz the firstborn, his brother Buz, Kemuel (the father of Aram),

Genesis 27:32

27:32 His father Isaac asked, “Who are you?” “I am your firstborn son,” he replied, “Esau!”

Genesis 38:6

38:6 Judah acquired a wife for Er his firstborn; her name was Tamar.