Shem. Compare Genesis 5:32; Genesis 10:21. In cases where there are several sons of one father, the collateral are dealt with first, and the main line taken up later. Hence Shem's main line is not dealt with till 1 Chronicles 1:24, after the sons of Japheth and Ham have been given.
Related Commentaries of 1 Chronicles 1:4
1 Chronicles 1:4
4 Noah, Shem, Ham, and Japheth.