My sister's name is
Candis (yes, that spelling...it's after our aunt) pronounced the traditional way, CAN-diss. So I'm not fond of the kan-DAY-see prn. and I really don't care for it if it's not a "legitimate" one in some way. Sorry. :-/
I love "The Forsyte
Saga" (it was
Damian Lewis, btw) and I prefer the eye-REE-nee prn. to the eye-REEN prn. But I still like both. Even though the former pronunciation is a 'legit' one, I doubt that many people would pronounce it that way at first glance. But seeing as
Irene isn't terribly common anymore (even less so in Scotland, maybe?) then perhaps young people in the future won't know the main prn. anyway. :b