My paternal family is Cosgrove. While some family lives in a Clones in Monaghan, my Grandmother insisted her line came from Galway. I don’t know which town or Parish, sadly all I know if they were not near the sea. There may have been a Romany/Traveller connection here as well.
Dd:
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I checked the 1901 census for Co. Galway and there were 38 Cosgrove households so the surname was found in the county. Do you have any information on the Cosgrove who left Ireland?
Roger McDonnell