The very same indeed... except, unlike most other fake princes (for example Terrence McCarthy who fraudulently claimed to be the MacCarthy Mor) Michael Stewart (who legally changed his name from Lafosse) never swindled people out of large sums of money by selling bogus titles.

More to the point, there was an American claiming to be a BPC descendant back in the 70s and 80s. I'll have to dig through my files to see if I can find any more information for those interested in the "Twilight World of Monarchy".