If you're asking what 'race' people are who have mixed background, IMO, due to the relative ease of space travel, genetic trees in some areas are just so mixed up with different backgrounds that it's impossible to define one particular racial area, such as the Zoners.
Also, Rheinland is not Russia. It is Germany.
Bretonia is more than British, it is more like the entire United Kingdom.
Hispania is most definitely -not- Caucasian, you've got your terminology wrong there. It's the least defined Sleeper Ship in terms of old earth races (someone else correct me if I'm wrong) but they're Spanish and/or South American.