Cross References → Genesis 22:23

Before the servant had finished praying, Rebekah came out with her jar on her shoulder. She was the daughter of Bethuel son of Milcah, the wife of Abraham’s brother Nahor. ... She replied, “I am the daughter of Bethuel, the son that Milcah bore to Nahor.” ... Then I asked her, ‘Whose daughter are you?’ She replied, ‘The daughter of Bethuel son of Nahor, whom Milcah bore to him.’ So I put the ring on her nose and the bracelets on her wrists.

and Isaac was forty years old when he married Rebekah, the daughter of Bethuel the Aramean from Paddan-aram and the sister of Laban the Aramean.

“Go at once to Paddan-aram, to the house of your mother’s father Bethuel, and take a wife from among the daughters of Laban, your mother’s brother. ... So Isaac sent Jacob to Paddan-aram, to Laban son of Bethuel the Aramean, the brother of Rebekah, who was the mother of Jacob and Esau.

Rebekah is here before you. Take her and go, and let her become the wife of your master’s son, just as the LORD has decreed.” ... And they blessed Rebekah and said to her, “Our sister, may you become the mother of thousands upon thousands. May your offspring possess the gates of their enemies.” ... And Isaac brought her into the tent of his mother Sarah and took Rebekah as his wife. And Isaac loved her and was comforted after his mother’s death.

Not only that, but Rebecca’s children were conceived by one man, our father Isaac.