Navy Georgina Callaghan, who performs as Callaghan, British musician Guy Callaghan (born 1970), New Zealand butterfly swimmer Ian Callaghan (born 1942), English footballer James Callaghan (1912–2005), British prime minister during the Winter of Discontent John Callaghan (born 1960), Principal & Chief Executive Solihull College & University Centre John Carter Callaghan (1923–2004), Canadian cardiac surgeon Leanne Callaghan (born 1972), British ski mountaineer and mountain climber Marissa Callaghan (born 1985), football player from Northern Ireland Mary Callaghan, Irish Social Democrats politician Morley Callaghan (1903–1990), Canadian writer, playwright, and media personality Patrick Callaghan (1879–1959), Scottish footballer Sheila Callaghan (born 1973), American playwright Steve Callaghan, writer of Family Guy TV series Stuart Callaghan (born 1976), Scottish footballer Tabby Callaghan (born 1981), Irish guitarist and singer-songwriter Terry Callaghan, British Arctic ecologist William M. Callaghan (1897–1991), Admiral, US Navy; commander of the battleship Missouri O'Callaghan Aidan O’Callaghan (born 1997): Contributor BBC3 One Hot Summer Barry O'Callaghan (born 1969): CEO of Riverdeep Interactive Learning Bill O'Callaghan (1868–1946): Irish hurler Billy O'Callaghan (born 1974): Irish novelist and short-story writer Cian O'Callaghan (born 1979) : politician, Irish Social Democrats Con O'Callaghan (decathlete) (born 1908): Ireland's first Olympic decathlete; brother of Pat O'Callaghan David O'Callaghan (dual player) (born 1983) David O'Callaghan (Kerry Gaelic footballer) (born 1987) Denis O'Callaghan (born 1949): Australian rules footballer Donncha O'Callaghan (born 1979): Irish international rugby union player Edmund Bailey O'Callaghan (1797–1880): doctor, journalist, and leader of political movements in Ireland and Quebec Gareth O'Callaghan (born 1961): Irish broadcaster & Author Gary O'Callaghan, (1933–2017): Australian radio announcer George O'Callaghan Irish footballer George O'Callaghan-Westropp (1864–1944): Irish landowner and politician George O'Callaghan, 2nd Viscount Lismore (1815 – 1898) Irish peer and British Army officer Geraldine O'Callaghan: kickboxer James M. O'Callaghan (born 1963): Distinguished Physician Assistant and drummer for the band C5. Jim O'Callaghan (born 1968): Irish Fianna Fáil politician John O'Callaghan (Medal of Honor) (1850–1899): American soldier and Medal of Honor recipient John O'Callaghan: Irish musician and DJ José O'Callaghan Martínez (1922–2001): Spanish Jesuit, papyrologist and Biblical scholar Joseph T. O'Callahan (1905–1964): Captain, US Navy, Jesuit priest, Medal of Honor recipient Kevin O'Callaghan Irish footballer Kilian O'Callaghan (born 1963): ballet dancer and teacher, from Monkstown, Co. Cork Miriam O'Callaghan (camogie): 26th president of the Camogie Association Miriam O'Callaghan (media personality) (born 1957): Irish television current affairs presenter with RTÉ Pat O'Callaghan (1906–1991): first Irish athlete to win an Olympic medal Paul O’Callaghan (born 1971): CEO WestAfricaENRG and Chair