Now the sons of Issachar were Tola, Puah, Jashub, and Shimron, four. The same number is given, Genesis 46:13 with a small variation of two of their names, there called Phuvah and Job, from whence so many families sprang, mentioned Numbers 26:23, where the names are the same as here.
Related Commentaries of 1 Chronicles 7:1
1 Chronicles 7:1
1 Now the sons of Issachar were, Tola, and Puah, Jashub, and Shimron, four.