O'Callaghan
Surname Origin
Surname Origin

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O'Callaghan Genealogy and Family History

What does the O'Callaghan surname reveal about your family history?

The earliest occurrence of the O'Callaghan surname in our family history documents is from 1600, and we currently have 71,540 records where O'Callaghan appears. Here are a few more facts to get you started…

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Colour photo of a young Nurse and Soldier

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O'Callaghansin military records

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O'Callaghansin census records

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O'Callaghansin convict records

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O'Callaghansin parish records

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