Jonas Quinn's native people on the (recently renamed) planet Langara. The Kelownans are one of three major people groups on the planet (with Terrania and the Andari Federation), who have achieved a fragile peace agreement following Kelowna's discovery of its Stargate and its alliance with Earth.
See further: Langarans
Meridian - Daniel Jackson saves Kelowna from a massive explosion when a naquadria experiment goes wrong -- but the scientists use him as a scapegoat. Jonas Quinn defects to Earth with the valuable mineral after seeing his government's gleeful reaction to the potential of building a naquadria bomb.
Shadow Play - SG-1 return to Kelowna, where the government is planning to use their new naquadria bomb in a pre-emptive strike against two rival nations.
Homecoming - Anubis's mind probe of Jonas leads him to Langara, where he discovers the powerful substance naquadria and occupies the Kelownan capital city.
Fallout - Carter and Teal'c help Jonas save his world from a potentially devastating naquadria explosion, while O'Neill and Jackson negotiate the Langarans relocation with representatives from the Joint Ruling Council.