O'Dwyer from New Ross

My great great grandmother was Mary O'Dwyer(1835-1912) from New Ross. She married Michael J. Keefe (I believe he was from County Waterford) and immigrated first to New York, then to Colorado. They had only one child, Katherine, who married my great-grandfather Jack Egan from Charlestown area, Mayo. I was looking for further information on the family, other descedants, etc.