I'm beginning to see Brookes in the media who are in their early 20's so the name is dated somewhat. My dd,
Brooke, has only known two in school so it doesn't seem to be overly common. Of your combos, I like
Brooke Emmeline best.
My dd was named
Brooke because I love the image of a brook and the sounds associated with it. It's very peaceful and poetic. Then again, I love most nature names. Would I do it again? I'd probably use it but call her by her fn,
Victoria, or use a nick,
Toria,
Tora,
Tori, etc.
Brooke for a girl,
Brook or
Brooks for a boy.