hmmm.. it's hard to pick only one favorite of mine.
Callista, Clementine, Delilah, Elodie, Jane, Juliet, June, Lola, Matilda, Mirabelle, Opal, Rosalie & Violet.
August, Beau, Cameron, Drew, Eli, Emmett, Jasper, Jude, Micah, Seth & Xavier.
Good luck to your sister, I hope the pregnancy all goes well and that she finds the perfect name for her baby!!