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 (Middle-earth) 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).