The sons of Israel were Reuben, Simeon, Levi, Judah, Issachar, Zebulun,
References for 1 Chronicles 2:1
Dan, Joseph, Benjamin, Naphtali, Gad, and Asher.
Judah had three sons through Bathshua, a Canaanite woman. Their names were Er, Onan, and Shelah. But the oldest son, Er, was a wicked man, so the LORD killed him.
Later Judah had twin sons through Tamar, his widowed daughter-in-law. Their names were Perez and Zerah. So Judah had five sons in all.
The sons of Perez were Hezron and Hamul.
The sons of Zerah were Zimri, Ethan, Heman, Calcol, and Darda -- five in all.
References for 1 Chronicles 2:6
Achan son of Carmi, one of Zerah's descendants, brought disaster on Israel by taking plunder that had been set apart for the LORD.
References for 1 Chronicles 2:7
The son of Ethan was Azariah.