What does 1 Chronicles 6:35 mean?

Toah was the son of Zuph, Zuph was the son of Elkanah, Elkanah was the son of Mahath, Mahath was the son of Amasai. 1 Chronicles 6:35 - Modern Text Bible

(The list continues, showing the deep roots of Heman's family and their long-standing role in temple worship.)