What is Renesmee's middle name?

Renesmee's middle name is Carlie. Her names come from her grandparents.

Renée + Esme = Renesmee

Carlisle + Charlie = Carlie

Her full name is Renesmee Carlie Cullen.

Just in case anyone wants to know where this is in the book it's found on page 515 and probably on another page earlier in the book.