Charles Ellicott Commentary Genesis 28:5

"And Isaac sent away Jacob. And he went to Paddan-aram unto Laban, son of Bethuel the Syrian, the brother of Rebekah, Jacob`s and Esau`s mother." — Genesis 28:5 (ASV)

Jacob’s and Esau’s mother: This insertion of particulars already well known is in exact accordance with the ancient Near Eastern manner of writing, which, moreover, is very careful to emphasize all matters of family relationships. (Compare Genesis 25:12.) It is worthy of notice that as Jacob has now been confirmed in the possession of the birthright by the father as well as by the mother, his name is placed first.