Timna was a concubine of Esau's son Eliphaz and she bore Amalek to Eliphaz. These are the sons of Esau's wife Adah.
(New American Standard Bible)
And Timna was concubine to Eliphaz Esau's son; and she bare to Eliphaz Amalek: these were the sons of Adah Esau's wife.
(King James Version)