Belus

Belus was a Goa'uld leading a people who believed their god found pleasure, as they did, in every agony inflicted on their foes. Omoroca fought him in order to free mankind from enslavement by the Goa'uld. Though Belus killed her, she was ultimately successful. Humans flourished into a civilisation which rivalled that of the Goa'uld. Daniel acknowledged that they owe Omoroca a great debt.

There is a strong possible link from Belus to the Goa'uld Marduk, because of the Babylonian God Bel-Marduk. This particularly brutal Goa'uld was imprisoned and punished by his own priests. Marduk was discovered within a ziggurat, buried alive in his Sarcophagus with an alien flesh eating creature, first by a covert Russian Stargate team, and then by SG-1, accompanied by a second Russian rescue team. This link is far more probable than that to Baal.

Though Stargate has never clearly stated a link between Marduk and Belus, the Oannes woman Omoroca was identified with the goddess Tiamat. Marduk possessed a fabled artefact of great power, sought by the Russians, called the Eye of Tiamat. It is a reasonable conclusion that Belus was Marduk and that he obtained the Eye after defeating Omoroca, also known as Tiamat.