Yes you can change the name however, to remove any issues it would be a legal process. You have to get the court orders for it. Click on the link to get the complete details of the process. Change name
Can I Still Change My Baby's Surname After She Is Already Registered?
I wish to change my daughters surname can I do this without her fathers permission? He has not paid anything towards her and we are not together I am unsure of his location also?