Esau went to Ishmael and married Mahalath, the sister of Nebaioth and daughter of Abraham’s son Ishmael, in addition to the wives he already had.
— Genesis 28:9
And Rehoboam married Mahalath, who was the daughter of David’s son Jerimoth and of Abihail, the daughter of Jesse’s son Eliab.
— 2 Chronicles 11:18
For the choirmaster. According to Mahalath. A Maskil of David. The fool says in his heart, “There is no God.” They are corrupt; their ways are vile. There is no one who does good.