“These are the sons of Israel, Reuben, Simeon, Levi, Judah, Issachar, Zebulun, Dan, Joseph, Benjamin, Naphtali, Gad, and Asher.”
The first listing of the 12 tribes of Israel is found in Genesis, chapter 35, where they are listed by their mother so that you could understand where the 12 tribes came from. Incidentally here in this book Jacob is always called Israel, never Jacob. The opposite is true in Genesis, where they are generally called the sons of Jacob. Here in Chronicles, there is no mention of the four different wives of Jacob. Thus you had the 11 clans of Esau or Edom and the 12 tribes of Jacob or Israel. The twelve clans of Israel had 4 different mothers. Leah was the mother of six sons or half of the tribes with (1) Reuben, (2) Simeon, (3) Levi, (4) Judah, (5) Issachar, and (6) Zebulun. Rachel was the mother of (7) Joseph and (8) Benjamin. Bilhah was the mother of (9) Dan and (10) Naphtali. Zilpah was the mother of (11) Gad and (12) Asher. The two maid servants, Bilhah and Zilpah, contributed to a third of the house of Israel. More information about these people can be found in chapters 29 and 30 of Genesis.