I got all the pronunciations from BtN. Perhaps you should correct
Mike. I'm sure the Western Canadian and the authentic French accents are very different though.
Desirée is very common in NA, and is pronounced the way I stated. It's far more common than Désirée (also pronounced the way I stated); in fact I'd never heard of Désirée until I discovered BtN--all my baby name books have only Desirée. If that makes you wince, consider the somewhat common butchering of Desirae.
Also, here we universally pronounce Renée re-NAY ("re" may also be spelled "reh", I suppose). That's just our accent.
Miranda