Narrowed it to three:
[name_f]Anastasia[/name_f] [name_f]Iris[/name_f]
[name_f]Anastasia[/name_f] [name_f]Elizabeth[/name_f]
[name_f]Anastasia[/name_f] [name_f]Hazel[/name_f]
What’s your pick?
I love [name_f]Anastasia[/name_f]! I think [name_f]Anastasia[/name_f] [name_f]Iris[/name_f] is my favourite. 
That’s tough, they’re all so pretty you really can’t go wrong either way! If I had to put them in order from my most favorite on down, it would be:
[name_f]Anastasia[/name_f] [name_f]Iris[/name_f]
[name_f]Anastasia[/name_f] [name_f]Hazel[/name_f]
[name_f]Anastasia[/name_f] [name_f]Elizabeth[/name_f]
For some reason when I saw the title the first thing I thought was [name_f]Anastasia[/name_f] [name_f]Belle[/name_f]…
Out of your options though, definitely [name_f]Anastasia[/name_f] [name_f]Iris[/name_f]! [name_f]Hazel[/name_f] doesn’t seem to suit it that well and [name_f]Elizabeth[/name_f] is too long to pair with [name_f]Anastasia[/name_f], which is also a long name. [name_f]Ivy[/name_f] has that perfect sweetness 
I pick [name_f]Anastasia[/name_f] [name_f]Iris[/name_f]. I like the contrast in length, and I think [name_f]Iris[/name_f] works better than [name_f]Hazel[/name_f]. Actually it depends on how you say [name_f]Anastasia[/name_f]–I was thinking I didn’t love the repeated -ay- sound in [name_f]Anastasia[/name_f] [name_f]Hazel[/name_f]… but if you say ana-STAH-see-ah instead, it works well with [name_f]Hazel[/name_f].