Religion: Jewish Catholic
Name: Harley Quinn
Alter Ego: Dr. Harleen Quinzel
Other Names: Holly Chance
First Appearance (Additional Details): (DC Universe comic) Batman: Harley Quinn (Oct. 1999): "Harley Quinn"
Super? (Has Super Powers/Special Abilities/Technology): Yes
Number of Appearances: 206
Comic Book Appearances: 180
TV, Film Appearances: 24
Video Game, Computer Game Appearances: 2
Enemy of: Batman
After years in which Harley had occasionally claimed to be Jewish, Gotham City Sirens #7 finally provided more explicit information about her religious background. This issue clearly states that she was born into and raised in a Jewish-Catholic family in Bensonhurst, Brooklyn.
Suggested links for further research about this character and the character's religious affiliation: