After my previous post caused a bit of a 'stir'....
I've had a little re-think.
I think I definitely prefer Rosie to Bonnie and still want to use Lea as a middle name (not as part of a double barrelled surname) as it is after my best friend. I have noted that a few of you read it as 'Leah' but with it being a middle name and as most of my friends and family know my friend Lea pronounced 'Lee' I don't think that concerns me too much.
I was trying to think of another middle name to go before Lea to avoid the obvious tea reference and one I kept going back to was 'Anna'.
I was sounding out Rosie Anna Lea and it sounded OK but not sure if it flows?
Then thought of possibly using Rosanna Lea, with the intention of calling her Rosie. I know if someone really thought about it they may put together the Rosie Lee reference but on official paperwork etc it wouldn't be as obvious. I'm still not completely convinced the Rosie Lee thing is so much of a big deal anyway, but would prefer to air on the side of caution after some of your comments 
So...
Rosie Anna Lea
or
Rosanna Lea but known as Rosie.
What do you think??