Religion: Christian (medieval) monk (fake) 
Name: Friar Tuck
Classification:
villain
clergy/religious leader
Publisher(s): 
First Appearance: Captain America Comics #59 (Nov. 1946): "Pennies from Heaven"
Creators: Bill Finger, Syd Shores, Vince Alascia
Number of Appearances: 1
Enemy of: Captain America
Ally: Robin Hood
Ally: Little John
Gender: male
"Friar Tuck" was a criminal who dressed as the classic Christian monk from Robin Hood stories. This criminal accompanied fellow criminals posing as "Robin Hood" and "Little John." There is no reason to believe that "Friar Tuck" adopted this guise for any reason other than because it fit with the "Robin Hood" shtick this criminal crew was using. He was not a real monk any more than he was really an adherent of medieval Christianity.
Captain America Comics #59 (Nov. 1946): "Pennies from Heaven"
Suggested links for further research about this character and the character's religious affiliation:
- http://www.marvunapp.com/master/frffrz.htm
- https://www.comics.org/issue/5468/
- http://comicbookdb.com/issue.php?ID=22701