We already have a pretty boldly named boy and three rare-ish elaborately named girls.
I’m guessing you don’t live somewhere where [name_f]Ambrosia[/name_f] custard/puddings are popular? If you don’t, [name_f]Ambrosia[/name_f] is usable. [name_u]Bo[/name_u], [name_f]Ami[/name_f], [name_f]Amy[/name_f], [name_f]Bee[/name_f], [name_f]Rosie[/name_f], [name_f]Amber[/name_f], [name_f]Ro[/name_f], [name_f]Rose[/name_f] etc all make very usable nn
I think [name_f]Ambrosia[/name_f] is lovely, and really, no less elaborate than the more known and used [name_f]Anastasia[/name_f] or [name_f]Alexandria[/name_f], for example. I definitely consider it to be usable. Also, if you already have children with more elaborate names, it would likely just easily fit right in with them.
I love the smooth, gentle sound of [name_f]Ambrosia[/name_f], its romantic whimsy, Greek Mythology association, and the general “immortal/unfading” meaning. It’s a beautiful name indeed.
I like it! I think its unexpected but not over the top, with lots of nickname potential: [name_f]Bree[/name_f], [name_f]Rose[/name_f], [name_f]Sia[/name_f], [name_f]Amy[/name_f], [name_f]Amber[/name_f] …
I think it’s a lovely sound, but do think of the desert brand greyblue mentioned!
I picture her alongside [name_f]Seraphina[/name_f], [name_f]Bianca[/name_f], [name_f]Cordelia[/name_f], [name_f]Ariadne[/name_f], [name_f]Angelica[/name_f]. Definitely within the realm of ‘‘usable’’.
Cool, thanks, you guys!
There is no pudding or anything here, the only association is the Greek mythology food. 
[name_f]Ambrosia[/name_f] is beautiful, but it is a lot of name to be the name she goes by every day. And with a name that long and unfamiliar, she may well decide she wants to use a nickname herself when she’s older. If you’re okay with her potentially going by a nickname though, it would be totally fine. I’d love to meet someone who was an [name_f]Amy[/name_f] or [name_f]Ama[/name_f], short for [name_f]Ambrosia[/name_f]!
I love it, I had it on my list for a while with nn [name_u]Bo[/name_u] and if you already have uncommon elaborate names for your other children it should fit just fine