My question involves name change laws in the State of: Arizona
My wife and I got married in Aug 07. She has a daughter from a different father who is 4.5years old. My step daughter has my wife's maiden name and her birth father is trying to change his daughters name to his. He stated since my wife's name has changed my step-daughter's name should no longer be my wife's maiden name and should be his name since his name will never change. When asked she wants to be my name like her mom and brother. Is he right? Can my wife and I change her name to my name? Please help

