Real World References
The name of the faction, Jetstone, seems to be a portmanteau of the names of the Hanna-Barbera cartoons The Jetsons and The Flintstones. The capital, Spacerock, is named according to the themes on the two shows. It might be meant as a portmanteau of something starting with "Space" and Bedrock, the city the Flintstones live in. Space rock is also a subgenre of rock music that emerged in the late 1960s music scene in Britain.