[name]Sidonie[/name], [name]Sidonia[/name] or [name]Serena[/name]
Which one do you like best?
I am a sucker for [name]Sidonia[/name]. I heard the name once and thought it was absolutely stunning. [name]Serena[/name] is pretty too, just doesn’t have the same punch as [name]Sidonia[/name] does.
I like both [name]Sidonie[/name] and [name]Serena[/name]
I have to go with [name]Serena[/name]. I know [name]Sidonie[/name] is a legitimate name, but it looks like a trendy spelling of [name]Sidney[/name] / [name]Sydney[/name].
I would go with [name]Serena[/name].
I prefer [name]Sidonie[/name] to [name]Sidonia[/name] and [name]Sidonia[/name] to [name]Serena[/name].
I think I’m biased, but I prefer [name]Serena[/name] 
I would have to go with [name]Serena[/name] in first place and [name]Sidonie[/name] in second.
Oddly enough, I just don’t like [name]Sidonia[/name]. Reminds me of Fredonia in the [name]Marx[/name] Brothers movie.
I’m extremely biased ([name]Hi[/name], nice to meet you, my name is [name]Serena[/name]) but I pick [name]Serena[/name] OR [name]Sidonia[/name] 
I like [name]Serena[/name].
With a sister [name]Astrid[/name] or [name]Bridget[/name], [name]Sidonie[/name]. With [name]Eliza[/name], [name]Julia[/name] or [name]Blythe[/name], [name]Serena[/name].
With [name]Julian[/name], [name]Maxwell[/name] or [name]Oliver[/name], [name]Sidonie[/name]. With [name]Frederick[/name] or [name]Matthew[/name], [name]Serena[/name].