Quinn Caroline sounds nice! I know they can be kind of boring but I think Quinn Elizabeth and Quinn Katherine work well too. Although Quinn Elizabeth sounds like Queen Elizabeth hmm...
Sorry, but i dont like Caroline, I dont know. But I love Quinn in girls (sound like Queen)
I think maybe:
Quinn Seraphina (I really love this name)
Quinntessa (yes, I think is diferent and very cool)
I hope you like one xoxo
I love. Quinn for a girl..