Mad Hatter II

Mad Hatter II ("Jervis Tetch"), also known as the Imposter Mad Hatter, was a recurring foe of Batman that appeared during the Silver Age of DC Comics. He is a thief and art collector, who stole the name of the original Mad Hatter, although this fact wouldn't be revealed until much later on.

Overview
The Imposter Mad Hatter first appeared in Detective Comics #230 (April 1956), eight years following the first appearance of the real Mad Hatter. Like the original Mad Hatter, he came into conflict with Batman and Robin, and was fond of stealing hats for his collection, and become fond of trying to get hold of Batman's cowl.

After a period of inactivity, the Mad Hatter attempted to go straight and do good deeds for once, however his need to do bad overwhelm him and he would end up committing crimes instead. Batman lured Hatter into a trap and put an end to his failed attempts at redemption.

Following the resurfacing of the original Mad Hatter, the Imposter was forced into retirement, although it was hinted at the time that he was killed by the real Hatter.

His most recent appearance was in Batman #700 (August 2010), in which he was now under the name "Hatman".

Batman (1960s series)
A version based off the Imposter Mad Hatter appeared as a recurring villain in the 1966-1968 Batman television series, with David Wayne appearing as the Mad Hatter.