Age), and Eris (Discord). And from Eris alone, came Ponos (Hardship), Lethe (Forgetfulness), Limos (Starvation), Algea (Pains), Hysminai (Battles), Makhai (Wars), Phonoi (Murders), Androktasiai (Manslaughters), Neikea (Quarrels), Pseudea (Lies), Logoi (Stories), Amphillogiai (Disputes), Dysnomia (Anarchy), Ate (Ruin), and Horkos (Oath). Descendants of Gaia and Pontus After Uranus's castration, Gaia mated with her son Pontus (Sea) producing a descendent line consisting primarily of sea deities, sea nymphs, and hybrid monsters. Their first child Nereus (Old Man of the Sea) married Doris, one of the Oceanid daughters of the Titans Oceanus and Tethys, and they produced the Nereids, fifty sea nymphs, which included Amphitrite, Thetis, and Psamathe. Their second child Thaumas, married Electra, another Oceanid, and their offspring were Iris (Rainbow) and the two Harpies: Aello and Ocypete. Gaia and Pontus' third and fourth children, Phorcys and Ceto, married each other and produced the two Graiae: Pemphredo and Enyo, and the three Gorgons: Sthenno, Euryale, and Medusa. Poseidon mated with Medusa and two offspring, the winged horse Pegasus and the warrior Chrysaor, were born when the hero Perseus cut off Medusa's head. Chrysaor married Callirhoe, another Oceanid, and they produced the three-headed Geryon. Next comes the half-nymph half-snake Echidna (her mother is unclear, probably Ceto, or possibly Callirhoe). The last offspring of Ceto and Phorcys was a serpent (unnamed in the Theogony, later called Ladon, by Apollonius of Rhodes) who guards the golden apples. Descendants of Echidna and Typhon Gaia also mated with Tartarus to produce Typhon, whom Echidna married, producing several monstrous descendants. Their first three offspring were Orthus, Cerberus, and the Hydra. Next comes the Chimera (whose mother is unclear, either Echidna or the Hydra). Finally Orthus (his mate is unclear, either the Chimera or Echidna) produced two offspring: the Sphinx and the Nemean Lion. Descendants of the Titans The Titans, Oceanus, Hyperion, Coeus, and Cronus married their sisters Tethys, Theia, Phoebe and Rhea, and Crius married his half-sister Eurybia, the daughter of Gaia and her son, Pontus. From Oceanus and Tethys came the three thousand river gods (including Nilus [Nile], Alpheus, and Scamander) and three thousand Oceanid nymphs (including Doris, Electra, Callirhoe, Styx, Clymene, Metis, Eurynome, Perseis, and Idyia). From Hyperion and Theia came Helios (Sun), Selene (Moon), and Eos (Dawn), and from Crius and Eurybia came Astraios, Pallas, and Perses. From Eos and Astraios came the winds: Zephyrus, Boreas and Notos, Eosphoros (Dawn-bringer, i.e. Venus, the Morning Star),