Q: If someone wants as their confirmation Saint “Virgen de Guadalupe ” what would you tell them? Have them change it to “Virgen Maria de Guadalupe” or “María” or is a title of our Lady acceptable for Confirmation as they asked about?
A: There are surprisingly no universal rules governing confirmation names because the custom is pretty much limited to the US. I would follow the lead of canon 855 that a baptismal name should not be “foreign to Christian sensibility.”
In my view, Virgen de Guadalupe is acceptable. Many hispanic men and women are named “Guadalupe”, which isn’t Mary’s name either. I think what this person is proposing should be fine.