Renesmee is an invented name. The daughter of BellaSwan and Edward Cullen of the Twilight-Saga (Stephenie Meyer) was called Renesmee. It is a combination of Renee (Bella’s mother) and Esme (Eward’s foster-mother’s name).
Meaning of Renesmee
There is no meaning of the name Renesmee, because it was invented. But it could mean “born again” (from Renée) and “loved”, “esteemed” (from Esme).