the letter is kinda borrow from another language, but I am not sure from which one, so i am not telling you...
it's pronaunced just like regular O. and the word is pronaunced the same way like u would pronaunce "rone" (I know there is no such word, but let's say there is
![Wink [;)]](/emoticons/emotion-5.gif)
) or Rome, but put "n" in the place of "m".