I prefer
Darcy for a boy (very Pride and Prejudice), and I don't really like
Shelby, but they do make a good sibset. I would go with feminine mns because they are so androginous.
Shelby VictoriaShelby AnneShelby RoseShelby Amelia
Darcy ElizabethDarcy MarieDarcy Kathleen Darcy Joanne
:)