Could just make it Nova Terra. Nova meaning new. 800 is probably better though considering most of the people picked up by the empire would be on fringe planets that the Sovreignty didn't care to squash a rebellion on. Those planets would have few Masulu on them by default, though with close trading relationships dual citizenship's tend to crop up. Hmmm I suppose that would depend on just how close that relationship was. How close would you care for it to be? Defensive pact with heavy trading maybe? That case would probably mean it would allow those specific people to move freely back and forth, though that depends on what the culture is like in the empire I suppose. As if you decided to get a citizenship their it would probably need to be a better place to live for atleast someone or some type of people.