The sons of Merari were Mahli and Mushi. These were the clans of Levi, according to their records.
TSK
TSK · Numbers 3:20
Treasury of Scripture Knowledge references in NET.
Exodus 6:19
TSK
The sons of Merari:Mahli and Mushi.These are the clans of the Levites by their families.
Serving beside them were their fellow Levites, the descendants of Merari, led by Ethan, son of Kishi, son of Abdi, son of Malluch,
The sons of Merari:Mahli and Mushi.The sons of Mahli:Eleazar and Kish.
From the sons of Jeduthun: Gedaliah, Zeri, Jeshaiah, Hashabiah, and Mattithiah– six in all, under supervision of their father Jeduthun, who prophesied as he played a harp, giving thanks and praise to the LORD.
Zechariah 12:13
TSK
the clan of the descendants of Levi by itself and their wives by themselves; and the clan of the Shimeites by itself and their wives by themselves–