By what name is the Gotham City super villain Oswald Cobblepot better known?

The Penguin (Oswald Chesterfield Cobblepot) is a fictional supervillain appearing in American comic books published by DC Comics, commonly as an adversary of the superhero Batman. The character made his first appearance in Detective Comics #58 (December 1941) and was created by Bob Kane and Bill Finger. The Penguin is one of Batman's most enduring enemies and belongs to the collective of adversaries that make up Batman's rogues gallery.

As a Gotham City mobster, the Penguin fancies himself a "gentleman of crime" and often wears a top hat and tuxedo. The character is a short, obese man with a long nose, and he uses high-tech umbrellas for weapons. The Penguin runs a nightclub called Iceberg Lounge, which provides a cover for his criminal activity, and Batman sometimes uses the nightclub as a source of criminal underworld information. Unlike most of Batman's rogues gallery, the Penguin is sane and in control of his actions, giving him a unique relationship with Batman. According to Kane, the character was inspired from the then advertising mascot of Kool cigarettes – a penguin with a top hat and cane. Finger thought the image of high-society gentlemen in tuxedos was reminiscent of emperor penguins.