The Order of St. John is military in origin, dating back to the Knights of Malta and the Crusades. I guess for some of them it would be like saying “Joans of Arc”. Using it’s proper title invoke umm, a sense of pride. 'St Johns' adds a conitation of being 'owned' where 'St John' shows membership. People would rather be a part of something than owned by it.    My two cents anyway... As for other names Mr R, yes there are plenty. Some of them deservingly so, but you get that everywhere. :) The irony I have is the ones that dis the black and whites when they are talking to me whilst I'm wearing my pvt 1st aid co uniform. 'N the ambo's I know that are 'secret' members ...