Mattithiah: A Chief of the Fourteenth Division (Shift) of Temple Musicians

From the sons of Jeduthun: Gedaliah, Zeri, Jeshaiah, Shimei, Hashabiah, and Mattithiah—six in all—under the direction of their father Jeduthun, who prophesied with the harp, giving thanks and praise to the LORD.

…the fourteenth to Mattithiah, his sons, and his brothers—12 in all;