Genesis 10:21

10:21 And sons were also born to Shem (the older brother of Japheth), the father of all the sons of Eber.

Genesis 10:24-25

10:24 Arphaxad was the father of Shelah, and Shelah was the father of Eber. 10:25 Two sons were born to Eber: One was named Peleg because in his days the earth was divided, and his brother’s name was Joktan.