Latinized form of Greek ‘Ρεια (Rheia), meaning unknown, perhaps related to ‘ρεω (rheo) "to flow" or ερα (era) "ground". In Greek mythology Rhea was a Titan, the wife of Cronus, and the mother of Zeus, Poseidon, Hades, Hera, Demeter and Hestia. Also, in Roman mythology a woman named Rhea Silvia was the mother of Romulus and Remus, the legendary founders of Rome.