Jahath was the first son. Ziza was the second son. But Jeush and Beriah didn’t have many sons. So they were counted as one family. They had only one task.
The sons of Amram were Aaron and Moses. Aaron and his family line were set apart forever as the Lord’s priests. They had the duty of setting the most holy things apart to the Lord. They offered sacrifices to the Lord. They served him. They gave blessings in his name forever.
Here are the names of the other Levite families. They are the Libnite family, the Hebronite family, the Mahlite family, the Mushite family, the Korahite family. Amram came from the Kohathite family.