A member of the Rainbow Man's gang. Billy Deegan was given the nickname "Dictionary" because of his tendency to use big words in his speech. He was much more intelligent than his fellow henchmen. Ultimately, his intellectual superiority and large vocabulary didn't help him against the crime-fighting Vigilante, who defeated him and his boss countless times.
- This version of William Deegan (Earth-Two), including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 7 Appearances of William Deegan (Earth-Two)
- 1 Images featuring William Deegan (Earth-Two)
- Quotations by or about William Deegan (Earth-Two)
- Character Gallery: William Deegan (Earth-Two)