I have been told by the famly she has always and only used on of her two maiden names, or her married name. Travellers and Roma I know, use either father or mother's names, to give you an example of why, I know a young Vlax Roma fellow Steven K... who's father is John U... and mother's last name is K..., for a complex set of reasons his affiliation to his mother's family is stronger, as the K... family have been traditionaly very conected to his city. There are a few law review articals on the use of different family names by Roma and Travellers, but if you spend time in the west of Ireland you find that use of paternomins is common as there is a small pool of names in isolated towns, so my late friend Sean Nee was more often know as Sean Luke, his father's first name.
Cheers Larry