looking back at your previous posts, and wonder if maybe this Anne might be a sibling to your greatgrandmother Margaret, rather than a direct ancestor.
My greatgrandparents were Michael Rossiter and Margaret Rossiter nee Mc grath
If you are sure Margaret's sister was Anne, and she married in 1888 in New Ross then as Elwyn mentioned, the best way to verify this, or not, is to order a cert and she if the father's details match up..
S.