Joah

"Jehovah his brother; i.e., helper. (1.) One of the sons of" "Obed-edom (1 Chr. 26:4), a Korhite porter." "(2.) A Levite of the family of Gershom (1 Chr. 6:21), probably the same as Ethan (42). "(3.) The son of Asaph, and "recorder" (q.v.) or chronicler to "King Hezekiah (2 Kings 18:18, 26, 37)." "(4.) Son of Joahaz, and "recorder" (q.v.) or keeper of the state archives under King Josiah (2 Chr. 34:8).

"(2 Chr. 34:8), a contracted form of Jehoahaz (q.v.)."

Definition of Joah:
"fraternity; brother of the Lord"