All these were Jacob's sons from his wife's servant, Zilpah.
Laban gave Zilpah his handmaid to his daughter Leah for a handmaid.
Joseph did this work with his brothers, the sons of Bilhah and Zilpah.
Leah, perceiving that she had desisted from child-bearing, delivered Zilpah, her handmaid, to her husband.
When Leah saw that she had left bearing, she took Zilpah her maid, and gave her Jacob to wife.
When Leah saw that she had finished bearing, she took Zilpah, her handmaid, and gave her to Jacob as a wife.
The sons of Zilpah(Leah's handmaid):
Gad and Asher. These are the sons of Jacob, who were born to him in Paddan Aram.
And the sons of Zilpah, Leah's handmaid;
Gad, and Asher: these are the sons of Jacob, which were born to him in Padan-aram.
This is the history of the generations of Jacob. Joseph, being seventeen years old, was feeding the flock with his brothers.
He was a boy with the sons of Bilhah and Zilpah, his father's wives.
Joseph brought an evil report of them to their father.
These are the generations of Jacob. Joseph, being seventeen years old, was feeding the flock with his brethren; and the lad was with the sons of Bilhah,
and with the sons of Zilpah, his father's wives: and Joseph brought unto his father their evil report.