In Greek mythology, Themisto (/θəˈmɪstoʊ/; Ancient Greek: Θεμιστώ) was a Thessalin princess as the daughter of King Hypseus of Lapiths[1] and the naiad Chlidanope.[2] Her name is derived from the Ancient Greek word: "θεμιστος" which means "belonging to the law", or "belonging to the customs".[3]