1 Chronicles begins with a list of 13 names, from Adam to Japheth. From Genesis 10, we know that the list is broken into two lists, 10 + 3. The first ten names mark generations from Adam to Noah; the list of three names are all from the same generation, the sons of Noah, Shem, Ham, and Japheth.
Their descendants are listed in reverse order:
A. Shem, 1:4
B. Ham, 1:4
C. Japheth, 1:4
C’. Sons of Japheth, 1:5-7
B’. Sons of Ham, 1:8-16
A’. Sons of Shem, 1:17-23
Japheth and Ham have a place, but they’re structurally folded into the generations of Shem.The structure instead highlights three key names, Adam, Noah, and Abraham, three originators, three fathers of humanity, spaced neatly at ten-generation intervals. Adam is the father of the human race, Noah of postdiluvian humanity, Abraham of the new humanity that is Israel.