With due respect to problemists, Chess problems are not Chess and Fairy
Chess problems are not Chess Variants. Though, of course many individuals
have a high level of interest in both problems and games, the overlap is
by no means 100%. For myself, I have only a very mild interest in
problems (though I can see why someone could find them fascinating).
Similiarly, I have known problemist fanatics who have little interest in
playing the game--to each his own.
If there is to be an orthodoxy in the naming of variant pieces let it be
based on usage in games rather than in problems--likewise, if there is to
be an orthodoxy in the naming of problem pieces, let it be based on usage
in problems rather than games.
I don't really care what someone names a piece. What would be a nice
touch on the game pages would be to put the piece's 'funny notation' after
the name: Thus the inventor could use Chancellor (RN), Marshal (RN),
Empress (RN), or Bogeyman (RN) and I know at a glance what piece is being
refered to.