Doctor Death (Dell 1)

Golden Age Origin
The first Doctor Death was a villainous mastermind of a foreign crime syndicate. He fought his nemesis Nibs Halloway, who was an employee of a jewelry company. Doctor Death would seemingly perish after each failed scheme but would return to plague Halloway each time.

Golden Age Pulp Appearances

 * All-Detective July 1934, September 1934, October 1934, and January 1935