(Εἰδοθέα), a daughter of the aged Proteus, who instructed Menelaus, in the island of Pharos at the mouth of the river Aegyptus, in what manner he might secure her father and compel him to say in what way he should return home. (Hom. Od. 4.365, &c.)

There are three other mythical personages of this name. (Hyg. Fab. 182; Schol. ad Soph. Antig. 972; Ant. Lib. 30.)