Names, for a book i'm attempting to write?

First of all, I will say this: only you can name your characters. Only you know exactly what they are like, which names fit them best, etc. That said, my suggestions are: For the girl: Claudia, Vivian or Holly. For the brother: Cameron, Seth or Joel. For the guy: Adrian, Ian, or Jesse. Also, try looking in the phone book, baby name books or sites, or behindthename.com for inspiration. Good luck!