These are the names of the sons of Israel (that is, Jacob) who moved to Egypt with their father, each with his family:
Reuben, Simeon, Levi, Judah,
Issachar, Zebulun, Benjamin,
Dan, Naphtali, Gad, and Asher.
In all, Jacob had seventy descendants in Egypt, including Joseph, who was already there.
References for Exodus 1:5
In time, Joseph and all of his brothers died, ending that entire generation.