Amadeus Arkham
- Also known as Dr. Amadeus Arkham
Founder of Arkham Asylum.
Appearances
- Who's Who: The Definitive Directory of the DC Universe #1 — 1985-03-00
- Arkham Asylum #[nn] — 1989-11-00
- Arkham Asylum #[nn] — 1990-06-00
- Harley Quinn #5 — 2001-04-00
- Legends of the Dark Knight 100-Page Super Spectacular #4 — 2014-11-00
- Harley Quinn by Karl Kesel and Terry Dodson: The Deluxe Edition #1 — 2017-11-00
- Batman: Arkham Asylum #[nn] — 2020-08-00
- DC Finest: Harley Quinn: The Birth of the Mirth #[nn] — 2025-04-00