Zilpah
Zilpah, handmaiden of Leah, had two sons, Asher and Gad, whose father was Jacob.
Background Reading:
Genesis 30:9-12
Zilpah
9 When Leah saw that she had stopped having children, she took her maidservant Zilpah and gave her to Jacob as a wife. 10Leah's servant Zilpah bore Jacob a son. 11 Then Leah said, "What good fortune!" So she named him Gad.
12 Leah's servant Zilpah bore Jacob a second son.13 Then Leah said, "How happy I am! The women will call me happy." So she named him Asher.