Tiamat was a Goa'uld System Lord who held power during the First Goa'uld Dynasty and posed as the Babylonian goddess of primeval chaos on Earth.
Biography
Background information
Driven mad by the near constant war and infighting of the system lords she became determined to destroy them. To this end, she on the planet later known as Marduk's Zoo, she genetically engineered a breed of "monster Goa'uld", both in the sense of monstrously powerful altered symbiotes and genetically enhanced monstrous wild animals to host them, such as the Giratablulluh, the Kusarikku, and the Ugallu.
She launched her revolt against Ra during this time and was branded a "mad queen". The ashrak Marduk soon offered to kill her, provided he was given free rein to do so as well as a position in the System Lords. What they did not know was that he was in fact doing it to gain the Eye of Tiamat so as to solidify his power. Marduk managed to kill Tiamat near the end of the First Goa'uld Dynasty. (RPG: "Roleplaying Game", "Living Gods: Stargate System Lords")