(Sumerian Nammu; Canaanite Yahm-Nahar; Biblical Leviathan, Rehab, tehom, tohu; Greek Typhoeus; Hurrian/Hittite Illugankas; Greek Typheous; Roman Typhon) A multi-headed dragon that is killed by Marduk (or Ashur) to save the gods and man kind

Tiamat is a primeval goddess in Babylonian and Sumerian mythology, and a central figure in the Enûma Elish creation epic. John C. L. Gibson, in the Ugaritic glossary of Canaanite Myths and Legends, notes that "tehom" appears in the Ugaritic texts, c. 1400–1200 BCE, simply meaning the "sea". Such a depersonalized Tiamat (the -at ending makes her feminine) is "The Deep" (Hebrew tehom), present at the beginning of the book of Genesis.

(Akkadian) mother of the gods and consort of Apsu

The female salt-water ocean goddess who fought Marduk; out of her body were created heaven and earth; the Babylonian name "Tiamat" is related to the Hebrew word for "deep waters," tehom.

Tiamat is the primordial mother goddess in Babylonian and Sumerian mythology, and a central figure in the Enûma Elish creation epic. She was known as Thalatth in the Hellenistic Babylonian Berossus' first volume of history.

Tiamat is a powerful draconic goddess in the Dungeons & Dragons role-playing game. The name is taken from Tiamat, a goddess in ancient Mesopotamian mythology who is substantially different (and does not have multiple heads).

Tiamat is the name of a planet theorized by a handful of fringe scientists to have existed between Mars and Jupiter. The concept of now vanished hypothetical planet existing where the asteroid belt now lies was first proposed in the Phaeton Theory. She is named for the Babylonian mother goddess Tiamat.