William Sully Unwin (born 1862) was an English clergyman and amateur rower.
In 1886, he was in the Boat Race again but lost the Wingfield Sculls to F I Pitman, whom he had beaten in the previous year.
[3][4] Unwin became a clergyman and in 1895 was in Kewick where he attempted to establish a rowing club.
In 1933, he was active in establishing the Council for the Preservation of Rural England in Norfolk.
[6] Unwin married Mary Frances Sully at Bridgwater in 1905.