Re: Thoughts on a nickname for my still-regretful name choice....
As far as I'm concerned, it sounds like you need to accept that Rosalie is her name and get on with loving your family! (Not that you aren't loving them, but it seems like dragging this on is only going to cause turmoil). You will love love love your daughter, regardless of whether you love her name. I wouldn't stress about a nickname. Something will come.
Zalia pronounced ZAILya doesn't seem to connect to Rosalie at all.
Some others to try out:
Ro
Ro-ro
Rovio - my favourite
RV (ha, maybe not)
R
Rosa
Rosie
Salie
Li
Lili
Osa
Rolie
Ollie
Osie
Anything?