In Greek mythology, Despoina () was the daughter of Demeter and Poseidon and sister of Arion. She was the goddess of mysteries of Arcadian cults who was worshipped under the title "Despoina" ("the mistress"), alongside her mother Demeter, one of the central figures of the Eleusinian Mysteries. Her real name could not be revealed to anyone except those initiated to her mysteries. Writing during the second century A.D., Pausanias spoke of Demeter as having two daughters; Kore being born first, before Despoina was born, with Zeus being the father of Kore and Poseidon as the father of Despoina. Pausanias made it clear that Kore is Persephone, although he did not reveal Despoina's proper name.