1 Chronicles 23:10 (KJV)

Moreover four thousand were porters; and four thousand praised the LORD with the instruments which I made, said David, to praise therewith.

And David divided them into courses among the sons of Levi, namely, Gershon, Kohath, and Merari.

Of the Gershonites were, Laadan, and Shimei.

The sons of Laadan; the chief was Jehiel, and Zetham, and Joel, three.

The sons of Shimei; Shelomith, and Haziel, and Haran, three. These were the chief of the fathers of Laadan.

And Jahath was the chief, and Zizah the second: but Jeush and Beriah had not many sons; therefore they were in one reckoning, according to their father's house.

The sons of Kohath; Amram, Izhar, Hebron, and Uzziel, four.

The sons of Amram; Aaron and Moses: and Aaron was separated, that he should sanctify the most holy things, he and his sons for ever, to burn incense before the LORD, to minister unto him, and to bless in his name for ever.

Now concerning Moses the man of God, his sons were named of the tribe of Levi.

The sons of Moses were, Gershom, and Eliezer.