I argue against this for one main reason.
The people of Sirius have had 800 years to grow and prosper. Yet the nations you speak of haven't appeared at all. 200 years is long enough for a nation's culture to change, 800 is far longer. By this stage I'd say they have been assimilated into the greater House culture since no mention of them can be found in the game, whether in news or rumours or even station names.
If you want to create nations out of nowhere, then I say we have the Byzantine Empire appearing again.
