These are Jacob’s sons by Bilhah, the slave girl whom Laban gave to his daughter Rachel. There were seven persons in this part of Jacob’s family.
(Laban gave his slave girl Bilhah to his daughter Rachel to be her servant.)
Reuben, Simeon, Levi, Judah,
He had two sons by Rachel’s slave girl Bilhah: Dan and Naphtali.
While Israel was there, Reuben had sexual relations with Israel’s slave woman Bilhah, and Israel heard about it. Jacob had twelve sons.
Naphtali’s sons were Jahziel, Guni, Jezer, and Shillem.