Additionally, Timna, a concubine of Esau’s son Eliphaz, gave birth to Amalek. These are the grandsons of Esau’s wife Adah.
Jewish Publication Society of America Version (JPS1917) - Genesis 36:12 >And Timna was concubine to Eliphaz Esau's son; and she bore to Eliphaz Amalek. These are the sons of Adah Esau's wife.