John Gill Commentary 1 Chronicles 2:1

"These are the sons of Israel: Reuben, Simeon, Levi, and Judah, Issachar, and Zebulun," — 1 Chronicles 2:1 (ASV)

Ver. 1,2 These are the sons of Israel
Or Jacob, the other 1 Chronicles 2:2

(See Gill on 1 Chronicles 2:1).