What is "autochthe"

In Greek mythology, Autochthe was one of the two daughters of Perseus and Andromeda. Her sister was Gorgophone. Her brothers were Perses, Alcaeus, Heleus, Mestor, Sthenelus, Electryon and Cynurus. She married Aegeus and had by him several daughters, but no sons. Some traditions held that she was the only spouse of Aegeus, yet in other accounts Aegeus was said to have married and divorced several times because none of his wives bore him male heirs, which put his kingdom at risk of being usurped.