Cercopes

They were a pair of monkey-like thieves which plagued the land of Lydia in western Anatolia. They were once captured by Heracles, for stealing his weapons, he was so amused with their jokes that he set them free unharmed. The pair later ran afoul of the god Zeus who transformed them into monkeys, or else turned them to stone, as punishment for their crimes.

Parents: Oceanus and Theia

Heracles and the Cercopes. Metope from Paestum.