Gaynor is both a surname and a feminine given name. Notable people with the name include:
Surname:
Adam Gaynor (born 1963), American guitaristBarrington Gaynor (born 1965), Jamaican footballerCiara Gaynor (born 1979), Irish camogie playerDave Gaynor, English drummerGloria Gaynor (born 1949), American singerJ.B. Gaynor (born 1990), American actorJanet Gaynor (1906–1984), American actressJessie Gaynor (1863–1921), American composerJock Gaynor (1928–1998), American actorJohn A. Gaynor (1846-1915), American politicianKatie Gaynor (born 1977), Australian baseball playerLen Gaynor (born 1944), Irish hurling managerMel Gaynor (born 1960), British musicianMitzi Gaynor (born 1931), American actress, singer and dancerRoss Gaynor (born 1987), Irish footballerTommy Gaynor (born 1963), Irish footballerWilliam Jay Gaynor (1849–1913), mayor of New York CityGiven name:
Gaynor Arnold, Welsh authorGaynor Barnes (born 1961), English television journalistGaynor Faye (born 1971), English television actressGaynor Hopkins (born 1951), the birth name of Welsh singer Bonnie TylerGaynor Lucas, minor character in the BBC soap opera EastEndersGaynor Rowlands (1883–1906), Edwardian actress of Welsh descent