Mangan is an Irish surname anglicised from the Gaelic Ó Mongáin ‘descendant of Mongan’, originally a byname for someone with a luxuriant head of hair (from mongach ‘hair’, ‘mane’).
Notable people include:
Alan Mangan, Irish Gaelic footballer
Albert Mangan (1915–1993), American Olympic racewalker
Andrew Mangan (writer), creator of Arsenal blog, Arseblog
Andy Mangan (born 1986), English footballer
Colm Mangan, Irish General
Cyrille Mangan (born 1976), Cameroonian footballer
Dan Mangan (born 1983), Canadian musician
Jim Mangan (1929–2007), American baseball player
Jack Mangan (1927–2013), Irish Gaelic footballer
James Clarence Mangan (1803–1849), Irish poet
James T. Mangan (1896–1970), author and eccentric
Joseph Mangan, American aerospace engineer
Josh Mangan (born 1986), Australian cricketer
Kate Mangan (1904–1977), British artist, actress and journalist. Lou Mangan (1922–2015), Australian rules footballer Lucy Mangan (born 1974), British journalist Luke Mangan (born 1970), Australian chef Mike Mangan (rugby union) (born 1975), American rugby union lock Mike Mangan (musician), American keyboard player Patricia Mangan (born 1997), American Olympic alpine skier Sherry Mangan (1904–1961), American writer, journalist, translator, editor, and book designer Simon Mangan (died 1906), Lord Lieutenant of Meath (1894–1906) Stephen Mangan (born 1968), English actor Tom Mangan (1926-1998), American politician and educator Tony Mangan (born 1957), Irish ultra distance runner