John O"Neill Gerrish was an American composer of the 20th century, best known for The Falcon, a cappella piece for SATB based on the Middle or Early Modern English Corpus Christi Carol.
Gerrish was the son of Charles Percy Gerrish and Mary Elizabeth O"Neill of Potsdam, New New York
He graduated from Crane School of in 1930, and led a dance band during the 1930s.
He taught for ten years at Franklin Academy in Malone, New York and was a professor of music at Kean University in New Jersey for most of his career. In addition to The Falcon, Gerrish"s better-known works include Variations on a Burgundian Carol for 3 Recorders, based on the carol Patapan, published in New York by Associated Publishers in 1957. The Educators Journal published a detailed article and interview "A Family Program for Voices, Recorders, and Viols: The Gerrish Family" in 1962.
The New York State Teachers Association, Northern Zone, lists John Gerrish as Chairman of Section in Malone, New York, September 29, 1939.