16. Shubael was the oldest son in the family line of Gershom.
17. Rehabiah was the oldest son in the family line of Eliezer. Eliezer didn't have any other sons. But Rehabiah had a great many sons.
18. Shelomith was the oldest son of Izhar.
19. Jeriah was the first son of Hebron. Amariah was his second son. Jahaziel was the third. Jekameam was the fourth.
20. Micah was the first son of Uzziel. Isshiah was his second son.