I've been pondering something lately. I am wondering if a Christian recieves a legal name change, which name will appear in Christ's Book of Life, and which will He call you by?

This question is confounding me, because I am considering a legal name change so that I can disassociate from my dad who was abusive when I was younger. I have accepted Jesus Christ as my Savior, and I have no questions about my salvation, but my name was changed once before from my birth name by my dad, and I want to change it to something completely different that the one he gave me which wans't my birth name anyhow..

But which will appear in the Book of Life??!!