1 Chronicles 6:1 (KJV)

GenealogiesWe have an account of Levi in this chapter. The priests and Levites were more concerned than any other Israelites, to preserve their descent clear, and to be...

Genesis 46:11 And the sons of Levi; Gershon, Kohath, and Merari.
Exodus 6:16 And these are the names of the sons of Levi according to their generations; Gershon, and Kohath, and Merari: and the years of the life of Levi were an hundred thirty and seven years.
Numbers 26:57 And these are they that were numbered of the Levites after their families: of Gershon, the family of the Gershonites: of Kohath, the family of the Kohathites: of Merari, the family of the Merarites.
1 Chronicles 23:6 And David divided them into courses among the sons of Levi, namely, Gershon, Kohath, and Merari.
Numbers 3:17 And these were the sons of Levi by their names; Gershon, and Kohath, and Merari.
1 Chronicles 6:16 The sons of Levi; Gershom, Kohath, and Merari.
1 Chronicles 6:20 Of Gershom; Libni his son, Jahath his son, Zimmah his son,

From OpenBible.info, most relevant first.

LeviAdhesion. (1.) The third son of Jacob by Leah. The origin of the name is found in Leah’s words (Gen 29:34), “This time will my husband be...
Gershon=Ger’shom expulsion, the eldest of Levi’s three sons (Gen 46:11; Ex 6:16).
KohathAssembly, the second son of Levi, and father of Amram (Gen 46:11). He came down to Egypt with Jacob, and lived to the age of one hundred...
MerariSad; bitter, the youngest son of Levi, born before the descent of Jacob into Egypt, and one of the seventy who accompanied him thither...

1 Chronicles 6:1 KJV