Arpachshad was the father of Shelah: Shelah represents the thirteenth generation of humankind. He is the son of Arpachshad in the Masoretic Text, but in the Septuagint he is the son of Cainan and the grandson of Arpachshad. The genealogy of Jesus in Luke 3.35-36 also lists Cainan as the father of Shelah.

And Shelah was the father of Eber: Eber represents the fourteenth generation since Adam. From his name the word “Hebrew” is derived. He was in direct line as an ancestor of Abraham (Gen 11.16-26) and of Jesus (Luke 3.23-35).

Quoted with permission from Omanson, Roger L. and Ellington, John E. A Handbook on 1-2 Chronicles, Volume 1. (UBS Helps for Translators). Miami: UBS, 2014. For this and other handbooks for translators see here .