Sheldon "Shelly" Moldoff (April 14, 1920 – February 29, 2012) was an American comic book artist best known for his early work on the DC Comics characters Hawkman and Hawkgirl, and as one of Bob Kane's primary "ghost artists" (uncredited collaborators) on the superhero Batman. He co-created the Batman supervillains Poison Ivy, Mr. Freeze, the second Clayface, and Bat-Mite, as well as the original heroes Bat-Girl, Batwoman, and Ace the Bat-Hound. Moldoff is the sole creator of the Black Pirate. Moldoff is not to be confused with fellow Golden Age comics professional Sheldon Mayer.
Source: Wikipedia, "Sheldon Moldoff", available under the CC-BY-SA License.