Assuming my history textbook is accepted, I was wondering if i could be positioned here:
[img=http://i.imgur.com/j4a0WLc.png]
Right where the red border and shaded red is. (Note; the two bottom left stars are my main solar systems, the larger being Regalis and the smaller being Digitalia. The one positioned more to the top-right is not officially owned by the Regatalis Communal Union, but two of the four planets have RCU colonies on them.

As for a prefix, I'd like Regatalis Communal Union, or Dominion of the RCU, the former being preferred.