O'Callaghan Surname Meaning & Origin
What the O'Callaghan last name means, where the surname began and how it spread.
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Meaning and origin of the O'Callaghan last name
Meaning of the O'Callaghan last name: a grandson of little Ceallach (war or strife). Smith's dictionary links the Irish surname O'Callaghan to a grandson of little Ceallach (war or strife). Roughly 4,287 people bear the surname O'Callaghan; the United States, Ireland and Australia are among their homes. Other spellings of the O'Callaghan name: O'Callahan.
Arms associated with the O'Callaghan name
Sharing a surname establishes no coat of arms entitlement; heraldry follows documented individual lineages.
Get your full O'Callaghan family history
This is only a glimpse of the O'Callaghan story. The full O'Callaghan history report goes much deeper into where the name began, who carried it and how the family spread, and it comes with a museum-style painted O'Callaghan coat of arms. Get the full O'Callaghan report.
O'Callaghan name FAQ
What does the O'Callaghan name mean?
A grandson of little Ceallach (war or strife). Common variants include O'Callahan.
Where does the O'Callaghan surname come from?
It originates in Ireland, and is also found in the United States and Australia.
Is there a O'Callaghan coat of arms?
Arms were granted to individuals rather than to everyone with a surname. Herald Lab paints a personalized O'Callaghan coat of arms in museum style, based on historic heraldry.
Sources: Elsdon C. Smith, Dictionary of American Family Names (1956), individual surname entries; modern indexed dictionary entries supersede conflicting interpretations.; Forebears, Surnam.es and individual surname distribution references.