'''Tiernan''' ({{langx|ga|MacTiarnaigh}} or {{lang|ga|Ó Tiarnáin}}; also spelled Tirnan, Tierney) is an Irish surname. Tiernan is also an anglicisation of {{lang|ga|Tiarnán}}, a given name derived from the Irish word {{lang|ga|tiarna}} "lord" + {{lang|ga|-án}} (diminutive suffix).<ref>https://www.allfamilycrests.com/t/mctiernan-family-crest-coat-of-arms.shtml</ref>
==As surname== Notable people with the surname Tiernan include: *Andrew Tiernan (born 1965), English actor *Bob Tiernan, American politician *Caleb Tiernan (born 2003), American football player *Cate Tiernan (born 1961), pen name of Gabrielle Charbonnet, American author *Dan Tiernan (born 1996), English stand-up comedian *Fergus Tiernan (born 1982), Scottish football midfielder *Frances Christine Fisher Tiernan (1846–1920), pen name "Christian Reid", American novelist, author *Greg Tiernan (born 1965), Irish-born-Canadian-based animator, director, voice actor *Jonathan Tiernan-Locke (born 1984), British cyclist *Mary Spear Nicholas Tiernan (1835–1891), American writer *Mike Tiernan (1867–1918), American professional baseball player *Patrick Tiernan (born 1994), Australian runner *Robert Tiernan (1929–2014), American lawyer, politician *Sonja Tiernan, Irish historian *Tommy Tiernan (born 1969), Irish comedian, actor, writer, presenter
==As forename== Notable people with the forename Tiernan include: *Tiernan Brady, Irish-Australian LGBT rights campaigner *Tiernan Killeen (born 2003), Irish hurler *Tiernan McCann (born 1991), Irish Gaelic footballer *Tiernan O'Halloran (born 1991), Irish rugby player
==See also== * McKiernan Clan * McKernan (surname) * Tiernan, Oregon, named for R. Tiernan * McKiernan * McTiernan * McTernan * Kiernan * Kernan (disambiguation)
==References== {{Reflist}}
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