In Greek mythology, Plouto or Pluto was a nymph an the mother of Tantalus by Zeus. Her parents were Oceanus and Tethys (thus making Plouto one of the 3000 Oceanids) or Himas, a Lydian that was otherwise unknown. Plouto was said to be married to Tmolus, the stepfather of Tantalus. The Romans used the name Pluto in reference to Hades, the Greek god of the underworld. However, the god and the nymph are not related. Plouto was also Demeter's and Iasion's son, better known as Plutus, and the personification of wealth. There is a common theme to these three personages: ancient Lydia was a wealthy kingdom, owing (in part) to their access to the mines of Asia Minor; Hades was associated with the mineral riches deep within the earth; and Plutus, son of Demeter, personified wealth (originally agriculture, later more broadly applied).