Of Jeduthun: the sons of Jeduthun; Gedaliah, and Zeri, and Jeshaiah, Hashabiah, and Mattithiah, six, under the hands of their father Jeduthun, who prophesied with a harp, to give thanks and to praise the LORD.
From Jeduthun's family: Gedaliah, Zeri, Jeshaiah, Hashabiah, and Mattithiah, totaling six members. They helped their father Jeduthun, who played the harp to thank and praise God.