What does 1 Chronicles 9:14 mean?

From the Levites, there was Shemaiah son of Hasshub, son of Azrikam, son of Hashabiah, from the family of Merari. 1 Chronicles 9:14 - Modern Text Bible

(The Levites, who assisted the priests, are also listed by family, starting with Shemaiah from the Merari branch.)