The lovely [name_f]Eliza[/name_f] is my favourite. My second choice would be [name_f]Xenia[/name_f] (I personally prefer this spelling), then [name_f]Zara[/name_f].
[name_f]Zara[/name_f] is my favorite. It has that unusual appeal to it, but also comes across as sophisticated and familiar. I like [name_f]Zenia[/name_f] also, but I much prefer the look of the [name_f]Xenia[/name_f] spelling.