'Ethan' was the default male protagonist name for HG/SS games, where in the G/S the name for the protag follows the version name (so you'd have Gold as default name if you played Pokemon Gold and your rival would be named Silver, and vice versa). It's not until Gen IV that he got 'officially' named as Ethan by appearing as a cameo.
Too bad the game company would probably permaban the account for "cheating", even if it's a false-positive. And if SW or Aventurine protest, said game company will probably pull a "Can ban you for any reason or no reason, with or without warning" clause (even though said clause is generally used as a fallback for unforeseen scenarios, not as a way for them to ban you because they feel like being a jerk).
