Rhea, in Greek Mythology, was a titanid, daughter of Uranus and Gaia. In Roman mythology it is identified as Cybele, the Magna Mater. The twelve titans, sons of Uranus and Gaia, were Ocean, Ceos, Cryo, Hyperion, Iapetus, Web, Reia, Themis, Mnemosyne, the golden crown Phoebe and the beloved Tethys and Cronos.
Cronus' sister and wife, generated in this order, according to Pseudo-Apollodore, Hera (the oldest), followed by Demeter and Hestia, followed by Hades and Poseidon; the next to be born, Zeus, was hidden by Reia in Crete, who gave a stone for Cronos to eat. Higino lists the children of Saturn and Ops as Vesta, Ceres, Juno, Jupiter, Pluto and Neptune, he also reports an alternative version of the legend, in which Saturn encloses Orco in Tartarus and Neptune under the sea, instead of eating them.
Because she is the mother of all the Olympian gods, she is known as the Mother of the Gods. She is a goddess related to fertility; this leads to an erroneous relationship with the goddess Cybele; which is the original Mother Earth from Asia Minor, and belatedly adapted to Roman mythology.