Well of course the company would try to name it something else, but the government wouldn't let them unless their claims were true. That would be false advertising which the government strictly forbids.
As for the Nazis, I doubt they tried the name you suggested. I think fairies were on their list of people to persecute. If you were a jewish fairy you were really up the creek.
Also, I don't think comparing the makers of Splenda to Nazis is really fair, do you? I doubt one day we'll all look back in horror at the Splendacaust.