Clipped from Wikipedia: Themyscira is a fictional island nation in the DC Comics universe that is the place of origin of Wonder Woman and her sister Amazons. Known as Paradise Island since Wonder Woman and the island's first appearance in All Star Comics #8 (December 1941), it was renamed "Themyscira" with the character's February 1987 relaunch in Wonder Woman (vol. 2) #1. The island is named after the mythological city of Themiscyra, the capital of the Amazon tribe in Greek mythology.
Fun Fact: When the Wonder Woman comic book was first introduced Paradise Island possessed giant kangaroos that the Amazons rode like horses called Kangas. Diana's Kanga was named Jumpa.
Dork Note: For more information on Paradise Island