I adore Gemma! If I didn't have a cousin named Jenna, it would totally be a top name for me.
Like PPs, I like Rosalyn but MUCh prefer spelling Rosalind. It looks more classic and yet unique since -lyn is is a popular ending now (Madelyn, Jocelyn, etc)
Jocelyn and Brynn are NMS but they are my third and forth pick from your list.
Re: Girls list
All of these are refreshing, but I especially love Brynn, Gemma and Sonia. I voted for Brynn (I like its simplicity), but they're all really nice.
D 2.20.2011 & Z 7.16.2013
DS born Oct. '11
TTC #2 with PCOS since Nov. '13
Dx: Low Progesterone (3.3) on 8/12/14
Waiting for RE appointment on 10/28/14
Surprise BFP on cycle 12 -- 10/19/14!
EDD July 1, 2015
But thanks for all the feedback!