Albert Barnes Commentary 2 Chronicles 20:14

"Then upon Jahaziel the son of Zechariah, the son of Benaiah, the son of Jeiel, the son of Mattaniah, the Levite, of the sons of Asaph, came the Spirit of Jehovah in the midst of the assembly;" — 2 Chronicles 20:14 (ASV)

“Mattaniah” is thought to be a corrupt reading for “Nethaniah,” who is mentioned among the sons of Asaph in 1 Chronicles 25:2 and 1 Chronicles 25:12.