# Cassidy (surname)

Cassidy (Irish:Ó Caiside / Ó Casaide) is a common Irish surname and is sometimes used as a given name. The surname translates to "descendant of Caiside". Variations include: Cassady, Cassiday, Cassedy, Casadei and Cassedey. The family was originally a Munster sept called Uí Chaisín but in the 12th century a branch moved to Devenish Island in County Fermanagh, where they became a medical and poetic family, hereditary physicians to the Maguires.

## People

* Barrie Cassidy, Australian journalist
* Bernard Matthew Cassidy, British soldier
* Bill Cassidy, American politician and physician
* Bob Cassidy, mentalist, speaker and author
* Bruce Cassidy, Canadian hockey coach
* Butch Cassidy, notorious Wild West criminal (née Robert LeRoy Parker)
* Christopher Cassidy, American astronaut
* Claudia Cassidy, American critic
* Colette Cassidy, former primetime newsbreak anchor for MSNBC
* Damian Cassidy, Irish Gaelic footballer
* Daniel Cassidy (1943–2008), American writer, filmmaker and academic
* Daniel Cassidy (footballer) (fl. 1926–1937), English football player
* David Cassidy (1950–2017), American musician, actor and erstwhile teen idol of Partridge Family fame, son of Jack Cassidy
* Derek Cassidy (born 1986), American football player
* Donie Cassidy, Irish politician and businessman
* Ed Cassidy, American drummer
* Edward Cassidy (1924–2021), Australian Roman Catholic cardinal
* Elaine Cassidy (disambiguation), several people
* Eva Cassidy (1963–1996), American singer
* George Cassidy (disambiguation), several people
* Harry Cassidy, Canadian academic and social reformer
* Jack Cassidy, Irish-American actor, father of David, Shaun and Patrick Cassidy
* James Cassidy (disambiguation), several people
* Joanna Cassidy, American actress
* John Cassidy (disambiguation), several people
* Joseph Cassidy (disambiguation), several people named Joe or Joseph
* Katie Cassidy, American singer and actress, daughter of David Cassidy
* Lewis C. Cassidy, Pennsylvania Attorney General
* Matthew Cassidy, Irish footballer
* Michael Cassidy (disambiguation), several people
* Natalie Cassidy, English soap actress
* Orange Cassidy (born 1984), ring name of American professional wrestler James Cipperly
* Owen Cassidy (1862–1911), New York politician
* Patrick Cassidy (disambiguation), several people
* Raffey Cassidy, English child actress
* Raquel Cassidy, English actress
* Scott Cassidy, American baseball player
* Shaun Cassidy, American celebrity, son of Jack Cassidy
* Stephen Cassidy, American labor leader
* Tania Cassidy, New Zealand professor of physical education
* Taylor Cassidy, African-American educator and TikToker
* Ted Cassidy, American actor
* Tommy Cassidy, Northern Ireland footballer
* Virginia Dell {Cassidy} Blythe Clinton Dwire Kelley, mother of US President Bill Clinton
* William F. Cassidy, American military

## Fiction

* Black Tom Cassidy, a Marvel Comics supervillain
* Cole Cassidy, a fictional character in the Blizzard Entertainment's 2016 video game Overwatch
* Hopalong Cassidy, a fictional cowboy created by Clarence E. Mulford
* Kid Cassidy, a member of the Gunhawks
* Proinsias Cassidy, a vampire from the Vertigo comic book series Preacher
* Sean Cassidy, aka Banshee, Marvel Comics superhero
* Theresa Cassidy, aka Siryn, Marvel Comics superheroine