What does the CH stand for? Confederatio Helvetica. Just don’t ask me how to pronounce it.
Who were the Helvetians? They were a tribe that lived in Switzerland that were beaten by Julius Cesar in 58 B.C. They lived (more or less) in the borders of modern day Switzerland. This isn’t terribly surprising as modern day Switzerland follows natural geographic boundaries (the Rhine, the Rhone, the Alps and the Jura).