Karun

Karun, dark god of the Underworld, was the Goa'uld who took humans, presumably from Northern Italy, and placed them on the planet P7J-989 by way of the Stargate, which came to be known as the "Eye of the Underworld" in the people's history. It is unknown why he placed them here, as it was of little strategic or resource value, but it was assumed to be for research purposes by the SGC. He ruled over the people for centuries while here, but was eventually overthrown in what came to be known as the "War of the Gods"; whether or not this was the Volsinii rebelling against their "god" or a System Lord choosing to make war on Karun, though the latter has more evidence to suggest it.

Karun's legacy would live on, however, as the people kept the legends of their "god" alive and indeed even named a toxic gas, Karun's Shroud, after him long after his death.