I have an 8 year old son whom I have sole custody of. My son and myself would like to change his last name back to mine. I gave him his dads last name, we were never married. I was 19 and my sons dad was a little on the violent side, so I didn't want to fight about it so I just gave my son his last name. My son asks me all the time if he can have my last name and even signs his last name on anything he can with my last name. How hard would it be to request that his last name be changed. Because I have sole custody will it be easier? I know his dad will not agree to it. I also live in ontario