Ulmo Ulmo Ulmo (from the Valarin Ulubôz, Ullubôz via Ulumō) is a fictional character in J. R. R. Tolkien's Middle-earth legendarium. He first appears in "The Silmarillion" as a god or Vala of the Elven pantheon. Ulmo is a title, which means "He who pours". He is also known as "King of the Sea" and "Lord of Waters". Ulmo is similar to the god Poseidon in Greek mythology, Neptune in Roman mythology, Ægir in Norse mythology, and Manannan in Celtic mythology. Ulmo was one of the chief architects of Arda (the world). Ulmo was second in majesty of the Valar, after
Pluto (mythology) the underworld. "Plūtō" (; genitive "Plūtōnis") is the Latinized form of the Greek "Plouton". Pluto's Roman equivalent is Dis Pater, whose name is most often taken to mean "Rich Father" and is perhaps a direct translation of "Plouton." Pluto was also identified with the obscure Roman Orcus, like Hades the name of both a god of the underworld and the underworld as a place. The borrowed Greek name "Pluto" is sometimes used for the ruler of the dead in Latin literature, leading some mythology handbooks to assert misleadingly that Pluto was the Roman counterpart of Hades. "Pluto" ("Pluton" in French