Gannon is an Irish surname, meaning "descendant of the fair one," perhaps denoting someone of Norse ancestry in Ireland. It may also derive from the Anglo-Saxon feminine name "Gunnhildr." Notable people with the surname include:

Artists and entertainers Craig Gannon (born 1966), English guitarist Jeff Gannon (born 1957), pen name of James Guckert, a former White House reporter Kim Gannon (1900–1974), American songwriter Mary Gannon (1829—1868), American vaudeville and general comic actress associated with many of the 18th and 19th century matron roles

Politicians Bob Gannon (1959–2017), American businessman and politician Tom Gannon (1943–2021), American politician

Sportspeople Conor Gannon (born 2002), Irish tennis player Jim Gannon (born 1968), English football manager Jim Gannon (rugby league) (born 1977), Australian professional rugby league player Jonathan Gannon, American football coach Kelli Gannon (born 1978), former field hockey midfield player from the United States Rich Gannon (born 1965), National Football League quarterback Tim Gannon (born 1948), polo player, co-founder of Outback Steakhouse Terry Gannon (born 1963), sportscaster for ESPN on ABC and ESPN

Others Bryant Illong Gannon (1912–1942), Australian private who was killed in the 1942 Dili massacre John D. Gannon (1948–1999, computer scientist, professor at the University of Maryland John Mark Gannon (1877–1968), former archbishop of the Diocese of Erie in Pennsylvania Kathy Gannon (born 1954), Canadian journalist Mary Gannon (1867–1932), co-founder of the architectural firm Gannon and Hands Theresa Gannon, British forensic psychologist

See also Gannon University, university in Erie, Pennsylvania An early romanization/spelling error of Ganon, villain from Nintendo's video game series franchise The Legend of Zelda

References