Fringe World colony (formerly?)
Jotun is a fringe colony.
In 2502 the War Pigs kidnapped a woman, Ellen Houston, from the mobile mine of Revelation, killing some of their security forces as they left. They had done so at the behest of her (ex-)husband, Denny.
The following section contains information from a previous version of StarCraft II which is no longer valid.
In the early stages of StarCraft II, Raynor's Raiders were hired by the Moebius Foundation to recover an alien artifact from protoss forces that guarded it. This mission does not appear in the final game, and Jotun is not mentioned.
The jötnar are a group of giants, monsters and minor gods in Norse mythology.