One Wonders....

And people always looked at me strangly when I said Rosies. We all knew where we were talking about though.

Someone will correct me if I'm wrong, but when us anglos say "Rosies", the "s" comes out sounding like a "z" - whereas the double "s" in Rossies should still sound like "s", rather than "z".

(I was gonna write "z" as "zed", but none of you US colonials would know what I was talking about.)

Isn't it wonderful to have nothing better to do?

Exactly right. So if any of you snowbirds actually knows the Spanish alphabet and that our pronunciation is based on phonetics (unlike that mashed up Anglo-speak you call the English language) then the pronunciation of Rossy or Rosi or Rosy becomes quite simple and will always be ROH-see, that is assuming you know that the "r" at the beginning of a word in Spanish is always trilled.