None of these guys were Catholic. They all lived in a church that did not recognize the supremacy of the Bishop of Rome.
Valentine and Nicolaus were Greek, and followed the Bishop of Constantinople.
Patrick was a Briton, and a Bishop of the Celtic Church in Ireland, which never recognized the Pope. In fact, it could be argued that Western Europe owes more to the Celtic Church than it does to Rome.
St.Patrick was catholic http://www.cin.org/users/james/files/patrick.htm
St. Nicolaus was catholic and patron saint of Russia
http://www.catholic-forum.com/saints/saintn01.
"...Western Europe owes more to the Celtic Church than it does to Rome."
Western Europe and UK has no earthly idea that this is true because they have been royally deceived.