What does 1 Chronicles 6:26 mean?

On Heman's left side was Ethan, from the family of Merari. Ethan was the son of Kishi, Kishi was the son of Abdi, Abdi was the son of Malluch. 1 Chronicles 6:26 - Modern Text Bible

(Ethan is introduced as another important musician, and his genealogy is traced through the Merari branch of Levi's family.)