Each house has its own pirates of origin exactly the same as the one mentioned house. RHA are rheinlanders, Blood Dragons are Kusarians so Gaians are bretonians. Only exception is Outcasts and Corsairs, who are pretty much all over the sirius. But they are also largest pirate societies, two parts of one completely another house.
I'm not entirely sure that's a good comparison. The Hessians and Dragons both have strong nationalistic roots, having been inspired by the Popular Revolution and that coup respectively. The Gaians are much more similar to the Hackers (group originally formed from a common profession), GMG (similar, though with that planetary part added in), or Rogues (random lowlife types).
There's another big point about the origins I didn't think of until now. There is a strong tendency to get Gaians - both originally and in new recruitment - from Cambridge University. Now, I'm not sure about you, but my experience with larger universities is that they tend to get people from all over the place. Cambridge and the CRI are at the foremost in a lot of research areas, so would a scientist or science student necessarily be Bretonian?
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