What does Nehemiah 11:13 mean?

Along with him were his relatives, two hundred forty-two men. Then there was Amashsai, son of Azarel, grandson of Ahzai, great-grandson of Meshillemoth, and descendant of Immer. Nehemiah 11:13 - Modern Text Bible

(Another priest, Amashsai, is introduced with his family background, and the number of his fellow priests is given.)