Religion: Catholic priest (fake)
Name: Father McCauley
Other Names: Dr. McCauley
First Appearance: Legion of Monsters: Werewolf by Night #1 (Aug. 2007): "To Be a Monster"
Creators: Skottie Young
Number of Appearances: 1
Enemy of: Frankenstein's Monster
Studied at: Holdenburg University of Science
Note: created monsters based on Frankenstein notes
Dr. McCauley was stripped of his medical certificate by Holdenburg University of Science. He posed as a priest, calling himself "Father McCauley." (It is not even clear from this story whether he was an actual Catholic or not, but presumably he had enough Catholicism in his background or upbringing that he thought he could pull of such a charade.)
McCauley murdered people who came to see him in his capacity as a "priest." He re-built them and re-animated into a series of monsters, following the notes of the original Dr. Frankenstein. Ultimately, the actual Frankenstein's monster confronted McCauley and destroyed his monsters.
Suggested links for further research about this character and the character's religious affiliation: