- Can you actually stop unwanted nick names?
e.g. We like Eloise Grace and Evangeline/Angeline Grace so...Is Eloise going to be Ellie even if I want Lulu; Evangeline/Angeline going to be 'Evie' or 'Angie' if I want GiGi.
-- What you do is always use the preferred nn, never use the original name except officially.
- Is GiGi a nice nn for dd or am I being whimsical!?
-- It's beautiful.
- Can I go for the french, Raphaelle for a girl or would it have to be Raphaella, and are the lads at work right about 'teenage ninja turtles?!'
-- I think you could use Raphaelle, but some people will get it wrong and call her Raphaella. This goes for a lot of French names ending with E (Marie turns in to Maria, etc) The Ninja Turtles are not exactly cutting edge popular culture right now, so ignore the lads at work.
-- (Isadore/Isadora question now settled.. But I would consider Isadore a boy's name, Isadora a girl's).
- How awful is it if a friend has the named new baby a name we REALLY LOVE (not close friend)and would 'prefer' I wouldn't use it...and we do?
-- There will be hard feelings; be prepared for a lot of cooling of the friendship. If this doesn't bother you, then go ahead.
- Is it stupid to have more than one nn for dd? e.g. if going for Angeline/Evangeline...french side of the family LOVE Angelie (on-ja-lee), English side of the family can't say it, and like GiGi
-- Are you sure the English side can't say Angelie? What is their problem? It's not rocket science. Not stupid, but maybe a bit confusing for your DD, depending on how often she wees the rellies. If she sees one side of the family a lot and then visits the others occasionally, she might be puzzled about being called something different. Or she might take it in her stride and not be a bit bothered. Can the French not say GiGi?
I think your expectations of both sides wrt pronunciation are simultaneously too high and too low (you want them to do it exactly as you do but don't think they possibly can), and that you're overthinking the potential cultural and linguistic problems. No matter how you choose, the French and English -speaking relatives are going to speak to your DD in different accents and languages. And no matter what you choose, your DD may confound you herself and come up with some charming nn or pronunciation of her own that will stick.