Jackie,
If the name Winifred was a confirmation name, it could be the same for both even (so long as it was suitable, usually a saint's name of some sort, then there was no restriction). Sometimes most of the confirmation group chose the same name.
I hope to get back to the ArchDiocesan archives within the next couple of months.
If you would like to PM me with the details you have, and any other family names that might be there, then I can have a look. Details in the register would include mother's maiden name. For 1881, the more precise dates you have the better, as the first film of the registers ends in the middle of 1881 and the second one begins. If you include an email then I may be able to send you some images from the register.
I particularly notice the Durkans in the register as there is a possible connection with my family name of McDonough, much earlier (1839), but no real evidence yet that these were related to my McDonoughs.
Sheila