That made me wonder about who married Jacob's sons.
http://www.biu.ac.il/JH/Parasha/eng/vayeshev/klei.html
There is a section headed
Jacob's Daughters-in-law
Rabbi Judah’s view: “Twin sisters were born to each and every tribe, and it was they whom they married.”
When in doubt about such things, it is relatively safe (no pun intended) to go with incest. I think Rabbi Judah's view is currently more kosher.Rabbi Nehemiah’ view: “They were Canaanite women.”
Jubilees gives - http://www.sacred-texts.com/bib/jub/jub69.htm
One has to wonder if the guy who wrote Jubilees had earlier sources. My wild guess is nothing special.And after Joseph perished, the sons of Jacob took unto themselves wives. The name of Reuben's wife is ’Adâ 1 and the name of Simeon's wife is ’Adîbâ’a, a Canaanite; 1 and the name of Levi's wife is Mêlkâ, 2 of the daughters of Aram, of the seed of the sons of Terah; and the name of Judah's wife, Bêtasû’êl, 3 a Canaanite; and the name of Issachar's wife, Hêzaqâ; and the name of Zebulon's wife, †Nî’îmân†; 4 and the name of Dan's wife, ’Êglâ; and the name of Naphtali's wife, Rasû’û, of Mesopotamia; and the name of Gad's wife, Mâka; and the name of Asher's wife, ’Îjônâ; and the name of Joseph's wife, Asenath, 5 the Egyptian; and the name of Benjamin's wife, ’Îjasaka. 21. And Simeon repented, and took a second wife from Mesopotamia as his brothers.