My Father, James F. Kerrigan thought we originated at County MAyo And I believe there was a Ballykerrigan in Mayo. I Trace My Grandfather(James F Kerrigan) to NYC born circa 1871. Family believes we had one more generation back born USA. I am working on Marriage record for Grandfather to see if I can get his parents. No Luck so far. If I get any further info. I will post to Kerrigan geneology. Thanks for input.