Given the Native American theme in the Confederation I've pictured the official name as The Confederation of the Eight Stars. It might be abbreviated with something like the Octastar Confederation or Confed of Eight.
Tammy and I talked about the Commonwealth. She feels since the Cossacks are the only race outsiders deal with the common name would be the Cossack Commonwealth. Internally its probably something like the Mutual and Common Alliance of the Cossacks, Saurians, Mantians, and Perinians.
It suddenly occurred to me just how absurd this scene was: a guy wearing a suit of armor, standing next to an undead king, both hunched over the controls of a classic arcade game.
-Ready Player One