# List of people with surname O'Neill

This is a list of people with surname O'Neill, including the variant spellings O'Neil and O'Neal.
* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* R
* S
* T
* W
* Y

## People
### A

* Alan O'Neill (footballer, born 1957), Irish football player
* Alan O'Neill (footballer, born 1973), Irish football player
* Alexander O'Neal (born 1953), American musician
* Alexandre O'Neill (1924–1986), Portuguese writer
* Alexander O'Neill aka Alexx O'Nell (born 1980), American musician and actor
* Amber O'Neal (born 1974), American professional wrestler
* Amos O'Neal, American politician
* Amy O'Neill (born 1971), an actress/performer
* Ana María O'Neill, an educator, author and advocate of women's rights
* Andrew O'Neill (born 1979), English vegan, anarchist, transvestite, stand-up comedian, musician and writer
* Anthony O'Neill (born 1964), Australian fiction writer
* Aisling O'Neill, Irish actress
* April O'Neil, a fictional character in the Teenage Mutant Ninja Turtles franchise
* Arthur Joseph O'Neill (1917–2013), an American bishop of the Roman Catholic Church
* Arthur O'Neill (1876–1914), was an Irish Ulster Unionist Party politician
* Arturo O'Neill (1736–1814), an Irish-born colonel who served the Spanish crown as governor of several places in New Spain (1781–1794)

### B

* Barbara O'Neil, American film and stage actress
* Bernie O'Neill (politician), member of the Pennsylvania House of Representatives
* Bernie O'Neill (bowls), Northern Irish lawn bowler
* Bernie O'Neill (Gaelic footballer) (born 1945), Irish Gaelic footballer
* Bill O'Neill (1880–1920), Canadian-born Major League Baseball player
* Bill O'Neill (born 1981), American professional bowler
* Billy O'Neill (rugby) (1878–1955), Welsh international rugby union player
* Billy O'Neill (footballer), Irish professional footballer
* Birch O'Neal (c. 1913–1995), FBI/CIA agent
* Brendan O'Neill (businessman) (born 1948), British business executive
* Brendan O'Neill (journalist), English journalist
* Brian O'Neill (ice hockey, born 1929), Canadian executive within the National Hockey League
* Brian O'Neill (ice hockey, born 1988), American ice hockey player
* Brian O'Neill (1574), chief of the O'Neills of Clanaboy, surrendering his title to Sir Philip Sidney for a knighthood in 1567
* Brian O'Neill (superintendent) (1941–2009), American superintendent of the Golden Gate National Recreation Area
* Brian O'Neill (American football) (born 1995), American football player
* Bryan O'Neil (1905–1954), British archaeologist and historian
* Buckey O'Neill (1860–1898), American soldier, sheriff, newspaper editor, miner, politician, gambler and lawyer
* Byron O'Neill (born 1970), American artist

### C

* Calvin O'Neal, American football linebacker
* Carol O'Neal (born 1948), American model and Playboy magazine's Playmate of the Month in July 1972
* Catherine O'Neill (cricketer), New Zealand-born Irish cricketer
* Charles Duncan O'Neal (1879–1936), Barbados politician and physician
* Charles O'Neal (1904–1996), American film and television screenwriter
* Christopher John O'Neill, Broadway actor
* Chris O'Neill, Irish animator and YouTuber
* Connor O'Neill, fictional Northern Irish character in the Australian soap opera Neighbours
* C. William O'Neill (1916–1978), American politician
* Carlos O'Neill (1760–1835), titular head of the Clanaboy O'Neill dynasty
* Cecily O'Neill, authority on Process drama and the arts in education
* Charles O'Neill (musician), Canadian bandmaster and composer
* Charles O'Neill (engineer) (1828–1900), Australasian engineer, inventor, parliamentarian and philanthropist
* Charles H. O'Neill (c. 1800–1897), Irish-born American politician and mayor
* Charles O'Neill (Pennsylvania politician) (1821–1893), American politician
* Charles O'Neill, 1st Earl O'Neill (1779–1841), British politician, peer and landowner
* Chloe Ann O'Neil (1943–2018), New York politician
* Christopher O'Neill (born 1974), British-American businessman and the husband of Princess Madeleine of Sweden
* Cian O'Neill, Irish Gaelic footballer, coach and manager
* Colm O'Neill (Ballyclough Gaelic footballer) (born 1988), Irish sportsman
* Colm O'Neill (Midleton Gaelic footballer) (born 1964), Irish sportsman
* Con O'Neill (actor) (born 1966), British actor
* Con O'Neill (diplomat) (1912–1988), British civil servant and diplomat
* Conn (Constantine) O'Neill, titular head of the Clanaboy O'Neill dynasty

### D

* Dave O'Neal (1937–2021), American politician, Lieutenant Governor of Illinois
* Deltha O'Neal (born 1977), American football player
* Damian O'Neill (born 1961), lead guitarist in the pop-punk band, The Undertones
* Dan O'Neill (born 1942), American underground cartoonist
* Dan O'Neill (writer), American journalist and writer
* Daniel O'Neill (painter) (1920–1974), Irish Romantic painter
* Daniel O'Neill (editor), Irish-born American newspaper editor and owner
* Daria O'Neill (born 1971), American radio and television personality
* Darren O'Neill, an Irish boxer
* Dennis O'Neill (disambiguation), several people
* Dermot O'Neill (disambiguation), several people
* Diarmuid O'Neill (1969–1996), English-born volunteer in the Provisional Irish Republican Army
* Dick O'Neill (1928–1998), American stage, film and television actor
* Don O'Neill (artist), American watercolorist and architect
* Donal O'Neill, Gaelic footballer for Galway
* Douglas F. O'Neill (born 1968), American Thoroughbred horse trainer

### E

* Eamon O'Neill (born 1944), Northern Irish nationalist politician in Northern Ireland
* Eamonn O'Neill (died 3 November 1954), Irish Cumann na nGaedhael and later Fine Gael party politician
* Edward O'Neill (disambiguation), several people
* Ed O'Neill (born 1946), American actor
* Ed O'Neal (1936–2022), American musician, of the Dixie Melody Boys
* Edward J. O'Neill (general) (1902–1979), American US Army officer
* Edward L. O'Neill (1903–1948), American politician
* Edward O'Neill, 2nd Baron O'Neill (1839–1928), arish peer and politician
* Eliza O'Neill (1791 – 29 October 1872), Irish actress, later baronetess
* Elizabeth O'Neill Verner (1883–1979), artist, author and lecturer
* Ella O'Neill, mother of playwright Eugene O'Neill and wife of actor James O'Neill
* Emmett O'Neill (1918–1993), American Major League Baseball pitcher
* Eric O'Neill (born 1973), American former American FBI operative
* Eugene M. O'Neill (1850–1926), Irish-born American lawyer and newspaper owner
* Eugene O'Neill (hurler) (born 1978), Irish sportsperson
* Eugene O'Neill (1888–1953), American playwright, and Nobel laureate in Literature
* Eunan O'Neill (born 1982), Northern Irish television presenter
* Evan O'Neill Kane (1861–1932), surgeon working in Pennsylvania, US
* Edward Asbury O'Neal (1818–1890), American Confederate general during the American Civil War
* Emmet O'Neal (1853–1922), American Democratic politician who was Governor of Alabama

### F

* Frank O'Neal, American cartoonist
* Frederick O'Neal (1905–1992), American actor and television director
* Fabián O'Neill (born 1973), Uruguayan former football midfielder
* Felim O'Neill of Kinard, Irish nobleman who led the Irish Rebellion of 1641 in Ulster
* Francis O'Neill (1848–1936), Irish-born American police chief and author of several Irish music collections
* Frank "Buck" O'Neill (1875–1958), American head football coach
* Frank O'Neill (footballer, born 1940) (born 1940), Irish footballer

### G

* Gail O'Neill, American model and television journalist
* Gary O'Neill, various people
* Gene O'Neill, American novelist
* George Bernard O'Neill (1828–1917), Irish genre painter
* George O'Neill (footballer, born 1942) (born 1942), Scottish footballer who played and managed in the US in his later career
* George O'Neill (footballer, born 1923) (1923–2003), English footballer
* Gerard K. O'Neill (1927–1992), American scientist
* Gerard M. O'Neill (1942–2019), American journalist and writer
* Griffin O'Neal (born 1964), American actor
* Gwendolyn O’Neal (born 1946), American academic administrator and home economist

### H

* Harriet O'Neill, American judge
* Harry O'Neill (disambiguation), several people
* Heather O'Neill (born 1973), Canadian novelist, poet, short story writer, screenwriter and journalist
* Henrique O'Neill, 1st Viscount of Santa Mónica, Portuguese noble and politician
* Henry O'Neill (disambiguation), several people
* Holly O'Neill (born 1998), Canadian soccer player
* Howard S. O'Neill (1883–1966), American politician and lawyer
* Hugh McShane O'Neill, Irish nobleman and rebel in the 16th and 17th centuries
* Hugh O'Neill (disambiguation), several people
* Hugo José Jorge O'Neill (1874–1940), Portuguese nobleman

### I

* Isabelle Ahearn O'Neill (1880–1975), stage and screen actor and Rhode Island legislator
* Ivan O'Neal, Vincentian political leader

### J

* Jack O'Neill, a fictional character in the Canadian-American SyFy television series Stargate SG-1
* Jamie O'Neal (born Jamie Murphy, 1968), Australian country singer and songwriter
* Jermaine O'Neal (born 1978), American NBA basketball player
* Jim O'Neal (born 1948), American blues expert, writer, record producer and record company executive
* Joseph T. O'Neal, American politician
* Johnny O'Neal, American jazz pianist
* Jack O'Neill (baseball) (1873–1935), Irish-American baseball catcher
* Jack O'Neill (businessman) (1923–2017), American businessman
* Jack O'Neill (disambiguation)
* Jacquie O'Neill (born 1969), English illustrator
* James O'Neill (disambiguation), several people
* Jamie O'Neill (born 1962), Irish authoer
* Jamie O'Neill (snooker player), English snooker player
* Jan Lehane (born 1941), married name O'Neill, Australian tennis player
* Jeff O'Neill (born 1976), Canadian broadcaster and former ice hockey player
* Jeffrey O'Neill (disambiguation), several people
* Jennifer O'Neill, American actress and model
* Jevon O'Neill, British film director and producer
* Jim O'Neill (disambiguation), several people
* Jimmy O'Neill (footballer, born 1931) (1930–2007), Irish football goalkeeper
* Jimmy O'Neill (footballer, born 1941), Northern Irish footballer
* João O'Neill
* João Pedro Torlades O'Neill
* Joaquim Torlades O'Neill
* Joe O'Neill, English footballer
* John Johnston O'Neill (1886–1966), Canadian geologist and academic
* John Joseph O'Neill (journalist) (1889–1953), American journalist
* John Joseph O'Neill (British politician) (1888–1953), English Liberal MP
* John Joseph O'Neill (American politician) (1846–1898), U.S. Representative from Missouri
* John O'Neill (disambiguation), several people
* John Raymond O'Neill, Canadian politician
* Jonjo O'Neill (jockey) (born 1952), Irish National Hunt racehorse trainer and jockey
* Jorge Maria O'Neill
* Jorge Torlades O'Neill I
* Jorge Torlades O'Neill II
* José Carlos O'Neill
* José Maria O'Neill
* Josh O'Neill (born 1988), American wheelchair rugby player
* Joseph O'Neill (disambiguation), several people
* Julian O'Neill (New Zealand rugby league), New Zealand rugby league footballer who played in England
* Julian O'Neill, Australia rugby league footballer
* Juliet O'Neill, Canadian journalist

### K

* Kathleen O'Neal Gear (born 1954), American writer
* Kate Tenforde (née O'Neill; born 1980), American long-distance runner
* Katie O'Neill, illustrator and writer from New Zealand
* Keith O'Neill (disambiguation), several people
* Ken O'Neal (born 1962), American football player
* Kevin O'Neill (disambiguation), several people
* Kim L. O'Neill, Irish biologist in the United States
* Kitty O'Neil (1946–2018), American stuntwoman and racer

### L

* Leon O'Neal Jr. (born 1998), American football player
* Leslie O'Neal (born 1964), American football player
* Laurence O'Neill, Irish politician
* Lawrence Joseph O'Neill, American judge
* Lawrence O'Neill (disambiguation), several people
* Linda O'Neill, Australian soccer player
* Louis O'Neill, American diplomat and attorney
* Luke O'Neill (disambiguation), several people

### M

* Madeline O'Neill (born 1867/68), British tennis player
* Maggie O'Neill, British actress
* Máire O'Neill (born 1978), Irish data encryption academic
* Maire O'Neill (1886– 1952), Irish actress
* Margaret O'Neill Eaton (1799–1879), wife of John Eaton, involved in the Petticoat Affair
* María de Mater O'Neill (born 1960), Puerto Rican artist, designer and educator
* Maria O'Neill, Portuguese member of the Clanaboy O'Neill dynasty
* Mark O'Neill (disambiguation), several people
* Martha Mary O'Neill, aka 'Mother Patricia', Irish-Australian Sister of Charity
* Martin O'Neill, Baron O'Neill of Clackmannan
* Martin O'Neill, Northern Irish footballer and manager
* Marty O'Neill (born 1965), Canadian lacrosse player and manager
* Mary Auguste O'Neill
* Mary Devenport O'Neill, Irish poet
* Mary O'Neill (Canadian politician), Canadian politician
* Mary-Anne O'Neill, Australian politician
* Mary Lovelace O'Neal, American artist
* Mary Thomas O'Neal (1887 – after 1974), Welsh-born American labor activist
* Maston E. O'Neal Jr. (1907–1990), American politician
* Matthew O'Neill (disambiguation), several people
* Maurice O'Neill (Irish republican), (d.1942), Executed Irish Republican
* Melinda O'Neal, American conductor of choral music
* Merlin O'Neill (1898–1981), Commandant of the United States Coast Guard 1950 to 1954
* Michael O'Neill (disambiguation), several people
* Michelle O'Neill, Irish politician, deputy First Minister of Northern Ireland since 2020, Vice President of Sinn Féin since 2018
* Mike O'Neal (born 1951), Kansas Republican politician
* Mildred O'Neill (1914? – 2003), wife of Speaker of the United States House of Representatives Tip O'Neill
* Moira O'Neill, pseudonym of Agnes Shakespeare Higginson (1864–1955), Irish-Canadian poet
* Morgan O'Neill, Australian writer, director, actor and producer

### N

* Nathan O'Neill, Australian cyclist
* Nicholas O'Neill (disambiguation), several people
* Norm O'Neill, Australian cricketer
* Norman O'Neill (1875–1934), English composer and conductor

### O

* Onora O'Neill, Baroness O'Neill of Bengarve
* Oona O'Neill, American actress
* Owen Roe O'Neill (c.1585 – 1649), Gaelic Irish soldier
* O'Neal Compton (1951–2019), American film and television actor
* O'Neill Donaldson (born 1969), English footballer
* O'Neill Spencer (1909–1944), American jazz drummer and singer
* Sir Neil O'Neill, Irish chieftain

### P

* Patrice O'Neal (1969–2011), American comedian
* Patrick O'Neal (disambiguation), several people
* Peggy O'Neal (disambiguation), several people
* Pete O'Neal (born 1940), American Black Panther Party member
* Pat O'Neill (disambiguation), several people
* Patrick O'Neill (disambiguation), several people
* Paul O'Neill (disambiguation), several people
* Pauline O'Neill (disambiguation), several people
* Pearse O'Neill, Irish Gaelic footballer
* Peggy O'Neil (1898–1960), Irish-American actress
* Peter O'Neill, former prime minister of Papua New Guinea
* Phelim (Felix) O'Neill
* Phelim Caoch O'Neill (1517–1542), prince of the Cenél nEógain
* Phelim O'Neill, 2nd Baron Rathcavan

### R

* Raiqwon O'Neal (born 2000), American football player
* Ralph Ambrose O'Neill, American flying ace from World War I
* Rebecca O'Neill (born 1981), New Zealand football player
* Richard O'Neill (disambiguation), several people
* Riley O'Neill (born 1985), Canadian soccer player
* Robert O'Neal (American football) (born 1971), former American football cornerback
* Robert O'Neal (murderer) (1961–1995), American white supremacist and convicted murderer executed in Missouri
* Robert O'Neill (disambiguation), several people
* Robin O'Neil, British historian
* Rose O'Neill (1874–1944), American illustrator
* Ryan O'Neill (American soccer player) (born 1978), American soccer midfielder
* Ryan O'Neill (Northern Irish footballer) (born 1990), Northern Irish footballer
* Ralph T. O'Neal (1933–2019), British Virgin Islands politician
* Reagan O'Neal, one of several pseudonyms of James Oliver Rigney Jr (1948–2007), American writer
* Ronan O'Neill, Irish Gaelic footballer
* Ron O'Neal (1937–2004), American actor, director and screenwriter
* Rose O'Neal Greenhow (1817–1864), Confederate spy
* Ryan O'Neal (born 1941), American actor

### S

* Séamus Ó Néill (1910–1986), Irish writer
* Shareef O'Neal (born 2000), American basketball player and son of Shaquille
* Shaquille O'Neal (born 1972), American basketball player
* Stanley O'Neal (born 1951), American business executive
* Steve O'Neal (born 1946), American football punter
* Seán O'Neill (born 1938), Northern Irish Gaelic footballer
* Sean O'Neill (table tennis) (born 1967), American table tennis player and coach
* Shane O'Neill (Irish chieftain) (c. 1530–1567), Irish chief of the O'Neill clan of Ulster
* Shane O'Neill (Irish exile) (c. 1599 – 29 January 1641), youngest son of Hugh O'Neill, Earl of Tyrone
* Shane O'Neill (Cork hurler) (born 1986), Irish sportsperson
* Shannon O'Neill (comedian), American comedian
* Shannon O'Neill (politician) (born 1937), Canadian politician
* Sharon O'Neill (born 1952), New Zealand singer-songwriter and pianist
* Sid O'Neill (1888—1915), Australian rules footballer
* Simon O'Neill (born 1971), New Zealand-born operatic tenor
* Stephen O'Neill (born 1980), Irish Gaelic footballer
* Steve O'Neill (1891–1962), American catcher, manager, coach and scout in Major League Baseball
* Steve O'Neill (owner) (1899–1983), American owner of a professional baseball team
* Steve O'Neill (rugby league) (born 1958), English rugby league footballer
* Susie O'Neill (born 1973), Australian swimmer

### T

* Tara Lynne O'Neill, Northern Irish actress
* Ted O'Neill, Dean of Admissions at the University of Chicago
* Terence O'Neill, Baron O'Neill of the Maine (1914–1990), the fourth Prime Minister of Northern Ireland
* Terry O'Neill (feminist) (born c. 1953), American attorney, professor and activist for social justice
* Terry O'Neill (martial artist) (born 1948), English actor and martial artist
* Terry O'Neill (photographer) (1938–2019), English photographer
* Thomas Newman O'Neill Jr. (1928–2018), American federal judge
* Thomas O'Neill (journalist) (1904–1971), American journalist
* Thomas O'Neill (Canadian politician) (1882–1965), Canadian politician
* Thomas P. O'Neill III (born 1945), American politician
* Tim O'Neill (Canadian football) (born 1979), Canadian football player
* Timothy O'Neill (soccer) (born 1982), American soccer player
* Tip O'Neill (1912–1994), American politician
* Tip O'Neill (baseball) (1858–1915), Canadian left fielder in Major League Baseball
* Titus O'Neil (born 1977; real name Thaddeus Bullard), American professional wrestler
* Todd O'Neill (born 1982), American singer
* Tom O'Neill (ice hockey) (1923–1973), Canadian ice hockey player
* Tommy O'Neill (born 1955), Scottish football midfielder
* Tony O'Neill, New York-based musician and author
* Tatum O'Neal (born 1963), American actress
* Tirlough Brassileagh Ó Neill, son of Phelim Caoch O'Neill, Prince of the Cenél nEógain
* Turlough Luineach Ó Neill (1532–1595), Irish earl of the Clan-Connell, inaugurated as the King of Tyrone
* Ty O'Neal (born 1978), American actor

### W

* Ward O'Neill (born 1951), Australian illustrator, caricaturist and cartoonist
* Wes O'Neill (born 1986), Canadian ice hockey player
* Willa O'Neill, New Zealand actress
* William O'Neill (Connecticut politician) (1930–2007), American Governor of Connecticut
* William O'Neill (Ohio jurist) (born 1947), American lawyer, jurist and appellate judge
* William O'Neill, 1st Baron O'Neill (1813–1883), Anglo-Irish hereditary peer, clergyman and musical composer
* William T. O'Neil (1850–1909), New York politician
* William J. O'Neil, American entrepreneur, stockbroker and writer
* William O' Neil (1848–?), member of the Wisconsin Legislature

### Y

* Yvonne O'Neill (1936–2010), Canadian politician