Thongor was a character in a series of sword-and-sorcery novels & stories written by Lin Carter, stylized after Conan the Barbarian and set in ancient Lemuria. The character was picked up by Marvel Comics in the 1970s for its series Creatures on the Loose which saw some of Carter's stories adapted, as well as the author himself contributing to later issues.
In 1978 a Thongor movie was said to be in production for release in 1979. Titled Thongor in the Valley of Demons, the project was later cancelled.