[name]Eve[/name] and [name]Carys[/name] are beautiful names, and while you may have to explain pronunciation once in a while, it’s easy to remember, and I honestly don’t think you’ll have too many problems with it.
I’m going to pick [name]Eve[/name] over [name]Carys[/name], however, just because I think it possesses a simple elegance and sophistication not found in [name]Carys[/name].
I love [name]Eve[/name] [name]Elisabeth[/name] [name]Adelheid[/name], and completely agree with you about middle names having meaning.
You asked about some other names, [name]Linnea[/name], [name]Nika[/name] and [name]Helena[/name].
While I’m not a fan of [name]Linnea[/name] (I worked with a [name]Linnea[/name] who ruined the otherwise beautiful name for me) or [name]Nika[/name], I do love [name]Helena[/name]. It’s one of my favorite names, but everytime I think of using it, I worry about pronunciation issues. I prefer Hel-len-uh, but know a Hel-lee-nuh and a Hel-lay-nuh. I also ponder the whole nickname issue, which is a concern for me.
You’ve chosen some truly beautiful names!