Son wants to help with name choice.

Michelle
So my sweet five year old son really wants to help pick the name for his baby sister to be. I'm trying to think of a way to tweak some of his name choices to possibly fit as a middle name?  
Baby's first name is Quinn...
(He likes names from all the kids movies lol... But maybe can find a way to change or add on to them somewhat? 
He likes Leah Jessie or anakin. (I know :)