Religion: obsessed with time
Alter Ego: David Clinton
Other Names: The Time Thief; Time-Thief
First Appearance: The Atom (vol. 1) #3 (Oct.-Nov. 1962): "The Time Trap!"
Super? (Has Super Powers/Special Abilities/Technology): Yes
Number of Appearances: 102
Comic Book Appearances: 100
TV, Film Appearances: 2
Enemy of: The Atom
Note: named for the Greek personification of Time
Chronos is the closest thing the Atom (Ray Palmer) has to an arch-enemy, although his status as such is not really comparable to some better known super-hero arch-enemies.
Suggested links for further research about this character and the character's religious affiliation: