Been doing that a lot. Got taylor, zade, casey, chase, alex, max , star, and I think im going with taylor brooke
Does your mom know anything about your sexual orientation/gender identity first? Is this purely a name change? Do you have a good relationship with her?
I remember choosing my name (for transition reasons), I told my mom by just saying this is what I want to be called. Of course at that point she knew of my transition, so just tell her your reasoning.