According to historian C. Thomas Cairney, the O'Shanahans were one of the chiefly families of the Dal gCais or Dalcassians who were a tribe of the Erainn who were the second wave of Celts to settle in Ireland between about 500 and 100 BC.[1]
Notable people with the surname include:
Bill Shanahan (born 1938), American former football coach
Brenda Shanahan (businesswoman), Irish businesswoman
Brenda Shanahan (politician) (born 1958), Canadian politician
Brendan Shanahan (born 1969), Canadian ice hockey executive and former player
Brendan Shanahan (author) (born 1979), Australian author
Carol Shanahan (born 1957), English businesswoman
Charif Shanahan, American poet and translator
Christopher Shanahan (born 1960), Australian barrister
Dan Shanahan (born 1977), Irish former hurler
Danny Shanahan (1956–2021), American cartoonist
David Shanahan (disambiguation), various people
Dennis Shanahan, Australian journalist and editor
Doug Shanahan (born 1979), American lacrosse coach and player
Eileen Shanahan (1901–1979), Irish poet
Eileen Shanahan (journalist) (1924–2001), American journalist
Elizabeth Shanahan, American political scientist
Elwill M. Shanahan (1912–1983), American politician
Fergus Shanahan (born 1955), British journalist
Foss Shanahan (1910–1964), New Zealand diplomat and public servant
Frank E. Shanahan Jr. (1923–2007), American politician
Greg Shanahan (born 1947), American baseball player
Holly Shanahan (born 1981), New Zealand actress
Jack Shanahan (born 1999), Irish drift driver
James Shanahan (1920–1997), United States Army Brigadier General
James Shanahan, birth name of Jamey Jasta (born 1977), American musician
Jamie Shanahan (born 1967), Australian rules footballer
Jamie Shanahan (hurler) (born 1994), Irish hurler
Jennie Shanahan (1897–1936), member of the Irish Citizen Army
Jeremiah F. Shanahan (1834–1886), American Roman Catholic prelate
Jesse Shanahan (born 1991), American disability activist and astrophysicist
Jim Shanahan (1901–1985), Australian rules footballer
Joe Shanahan, American businessman and music industry executive
John Shanahan (disambiguation), various people
Joseph (Ignatius) Shanahan (1871–1943), Irish priest, missionary and bishop in Nigeria
Katie Shanahan (born 2004), British swimmer
Kid Shanahan (Joseph A. Shanahan, active 1873–1883), river pirate and member of the Patsy Conroy Gang
Kyle Shanahan (born 1979), American football coach
Louise Shanahan (born 1997), Irish athlete
Mark Shanahan, Irish conductor
Martin Shanahan (born 1973), Irish businessman and public servant
Martina Shanahan (1965–2021), Irish member of the Winchester Three
Matt Shanahan (born 1976), Australian basketball coach and former player
Matt Shanahan (politician) (born 1964), Irish independent politician
Maurice Shanahan (born 1990), Irish hurler, brother of Dan Shanahan
Megan Shanahan (born 1985), Australian rugby union player
Melanie Shanahan (1964–2003), Australian folk singer and songwriter
Mike Shanahan (disambiguation), various people
Murray Shanahan, professor of cognitive robotics at Imperial College London
Neil Shanahan (1979–1999), Irish racing driver
Nicole Shanahan (born 1980s), American attorney and reported vice presidential candidate
Patrick Shanahan (disambiguation), various people
Paul Shanahan (1948–2011), Australian rules footballer
Paul Shanahan (hurler), Irish hurler
Peter Shanahan (born 1946), Australian rules footballer
Phiala E. Shanahan, Australian theoretical physicist
Philip Shanahan (1874–1931), Irish Sinn Féin politician
Phil Shanahan (1928–2012), Irish hurler
Rebecca Shanahan, Australian artist and photographer
Rob Shanahan (born 1966), American photographer and rock drummer
Sean Shanahan (1951–2022), Canadian ice hockey player
Steve Shanahan (born 1970), Canadian politician
Terry Shanahan (born 1951), English former footballer
Thomas Michael Shanahan (1934–2011), American judge
Timothy Shanahan (disambiguation), various people
Tom Shanahan (1925–2014), American broadcaster
William Shanahan (1897–1954), Irish athlete
^Cairney, C. Thomas (1989). Clans and Families of Ireland and Scotland. Jefferson, North Carolina, United States, and London: McFarland & Company. pp. 61–69. ISBN 0899503624.
Nicole Ann Shanahan (born September 26, 1985) is an American attorney who is involved in the technology industry. She is the running mate of Robert F....
Shanahan is a surname of Irish origin. According to historian C. Thomas Cairney, the O'Shanahans were one of the chiefly families of the Dal gCais or Dalcassians...
Brendan Frederick Shanahan (born January 23, 1969) is a Canadian professional ice hockey executive and former player who currently serves as the president...
Kyle Michael Shanahan (born December 14, 1979) is an American football coach who is the head coach for the San Francisco 49ers of the National Football...
Michael Edward Shanahan (born August 24, 1952) is an American football coach serving as an offensive consultant to the New York Jets, best known as the...
Joe Shanahan is the founder and owner of Metro Chicago and smartbar in Chicago, Illinois. He is also the part owner of the Daily Bar and Grill, as well...
Dennis Shanahan is a political editor of The Australian, a newspaper in Australia. Shanahan has been a journalist at major newspapers for "almost forty...
Katie Shanahan (born 25 June 2004) is a British swimmer. Shanahan competed in the women's 400 metre individual medley event at the 2021 FINA World Swimming...
Carol Ann Shanahan OBE (born December 1957) is an English businesswoman and club chairperson of Port Vale Football Club. Shanahan was born in December...
Timothy Shanahan may refer to: Timothy Shanahan (philosopher) (born 1960), American philosopher Timothy Shanahan (educator), American educator Timothy...
Rob Shanahan is an American photographer and rock drummer known for his concert photography and portraits of celebrities. He has been the preferred photographer...
published. Smith also headlined a benefit concert headed by bandmate Tony Shanahan, for Court Tavern in New Brunswick, New Jersey. Smith's set included "Gloria"...
Murray Patrick Shanahan is a professor of Cognitive Robotics at Imperial College London, in the Department of Computing, and a senior scientist at DeepMind...
Jack Shanahan (born 3 August 1999) is an Irish professional drift driver from Cork. Shanahan was the 2016 and 2017 champion of the British Drift Championship...
Holly Shanahan (born 23 November 1981) is a New Zealand actress. She is best known for playing Leelee in Power Rangers Mystic Force and Camille in Power...
Patrick Shanahan may refer to: Patrick M. Shanahan (born 1962), former acting United States Secretary of Defense Patrick Shanahan (politician) (1908–2000)...
Matthew Shanahan (born 13 July 1976) is an Australian basketball coach and former player. He played 15 seasons in the Australian National Basketball League...
Louise Shanahan (born 26 January 1997) is an Irish athlete. She competed in the women's 800 metres event at the 2020 Summer Olympics. Shanahan obtained...
Mark Shanahan is an Irish conductor and conducting teacher. Mark Shanahan was born in Manchester, where he attended Chetham's School. He later attended...
Martin Shanahan (born 1973) is a former Irish public servant, CEO of inward investment agency IDA Ireland from 2014 to 2022, now a partner at Grant Thornton...
James Shanahan (born August 7, 1977), known professionally as Jamey Jasta, is an American vocalist, best known as the lead singer of metalcore band Hatebreed...
Maurice Shanahan (born 1 February 1990) is an Irish hurler who plays as a right corner-forward at senior level for the Waterford county team. Born in Lismore...
Melanie Therese Shanahan (January 1964 – 10 December 2003) was an Australian world-folk singer-songwriter, choir director and vocal coach. She was a member...
G. Shanahan (1920 Pompey, New York – 8 January 1997 Alexandria, Virginia) served in the United States Army from 1942 through 1973. James Shanahan joined...
Daniel Shanahan (born 4 January 1977) is an Irish former hurler. He has been a selector with the Waterford county team since 2013. Born in Lismore, County...
Brenda Shanahan may refer to: Brenda Shanahan (businesswoman), Irish businesswoman Brenda Shanahan (politician) (born 1958), Canadian politician This...
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