Tiernan (Irish: MacTiarnaigh or Ó Tiarnáin; also spelled Tirnan, Tierney) is an Irish surname. Tiernan is also an anglicisation of Tiarnán, a given name derived from the Irish word tiarna "lord" + -án (diminutive suffix).[1]

As surname

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Notable people with the surname Tiernan include:

As forename

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Notable people with the forename Tiernan include:

See also

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References

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