The surname Gallagher has its roots in Ireland, specifically originating from the noble Gallagher family in County Donegal. It is an anglicized form of the Irish Ó Gallchobhair or Ó Gallchobhoir, with the masculine and feminine forms being Ó Gallchobhair and Ní Ghallchobhair, respectively. The pronunciation of Gallagher varies, with distinct differences noted between regions in Ireland and further adaptations in Britain and the USA. Numerous variants of the surname exist, such as O'Gallagher, Gallacher, and Gallaher, reflecting its widespread adaptation and evolution over time.
The last name Gallagher appears about 69834 times in U.S. Census records, earning it rank #479 nationally. This equals around 24 individuals per 100,000 in the U.S.
Our database contains over 55008 people with the last name Gallagher. This surname is most commonly found in Florida, Pennsylvania, California. We have over 36 unique first names combined with the last name Gallagher in our records. The most frequent first names associated with this surname are John, Michael, James.
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