It is wonderful to see that you have found some information on your great grandmother, her parents and children!
Kilmacrow and
Greenville are neighboring townlands in County Kilkenny, so it is quite feasible to assume this is roughly the same location. The county border between Kilkenny and Waterford is a little further south and runs through the middle of the River Suir separating the counties which explains why it is Waterford, County Kilkenny.
As she was born in 1887, the civil records for her would be kept at the
General Register Office of Ireland(GRO). Entering the details you have given leads to this record for
Catherine Stacey. Hopefully, this gives you confidence that the information you already have is indeed correct.
I’d love to know, which of her children is your grandparent?