It's more than a name change, it's an identity change.
Our words, the words of others, if repeated in our minds & hearts become can become our beliefs. Our words become our beliefs and our actions follow our beliefs. HOWEVER. Only you can allow words to have that power over you.
What name or names have others tried to give you?
What name or names have you tried to give yourself?
What is the name God has given you?
Proverbs 18:21:
"Words kill, words give life; they're either poison or fruit—you choose."