and Esau went to Ishmael, and married, besides the wives that he had, Mahalath the daughter of Ishmael, Abraham's son, the sister of Nebaioth.
(New American Standard Bible)
Then went Esau unto Ishmael, and took unto the wives which he had Mahalath the daughter of Ishmael Abraham's son, the sister of Nebajoth, to be his wife.
(King James Version)