“The six sons of Jeduthun were Gedaliah, Zeri, Jeshaiah, Shimei, Hashabiah, and Mattithiah. They, under the direction of their father Jeduthun, prophesied with the lyre in thanksgiving and praise to Yahweh.”
Here Jeduthun represents the Merari Levites, instead of Ethan as in chapter 6 of this work. His 6 sons played the lyre and gave thanks and praise to Yahweh. There were 3 other people with the name of (1) Gedaliah, but (2) Zeri only appears here. There were a few others with the name of (3) Jeshaiah, mostly Levites. There were about 15 other people with the name of (4) Shimei. There were over 11 people with the name of (5) Hashabiah, mostly Levites. There were only 4 with the name of (6) Mattithiah in the biblical literature. They too were prophetic musicians, particularly the lyre.