[name]Alma[/name] [name]Vivia[/name]: With [name]Alma[/name], something about the flow with [name]Vivia[/name] seems off to me. I guess I picture [name]Alma[/name] paired with a vintage name like [name]Frances[/name] or [name]Josephine[/name].
[name]Calla[/name] [name]Frances[/name]: I love [name]Calla[/name], but when it’s paired with an F middle name, it starts to sound like [name]California[/name] when I say it out loud. (Esecially [name]Calla[/name] [name]Fiona[/name]…) From your list, I love [name]Calla[/name] [name]Josephine[/name]. 
[name]Celia[/name] [name]Mercedes[/name]: I love [name]Celia[/name], but I can’t picture it with [name]Mercedes[/name]. When I say it out loud, I’m hearing something close to “Sell ya a [name]Mercedes[/name]” pr “steal a [name]Mercedes[/name].” I love [name]Celia[/name] [name]Frances[/name] and [name]Celia[/name] [name]Margaret[/name]!
[name]Eula[/name] [name]Cassandra[/name]: I’m not a [name]Eula[/name] fan, but I like [name]Eulalie[/name] [name]Frances[/name].
[name]Karen[/name] [name]Emmeline[/name]: I love [name]Emmeline[/name], but [name]Karen[/name] and [name]Emmeline[/name] have very different styles to me.
Merit [name]Josephine[/name]: I think this is very pretty…
[name]Naomi[/name] [name]Agatha[/name]: I think [name]Naomi[/name] is great, but I’m not an [name]Agatha[/name] fan.
[name]Oona[/name] [name]Beatrice[/name]: I really like this!
My favorites: [name]Calla[/name], [name]Celia[/name], [name]Frances[/name], [name]Emmeline[/name], [name]Josephine[/name], [name]Beatrice[/name].
[name]Favorite[/name] combos: Merit [name]Josephine[/name] and [name]Oona[/name] [name]Beatrice[/name].
Good luck! 