My son is 10 years old. Throughout his life, his father has been very unstable (not mentally but that's questionable also). His father walked out of his life with no explanation over a year ago. My son wanted to change his last name but I needed his father's consent. I contacted my ex and explained what my son wanted to do. He requested to speak to him. I arranged a time for my son to call him and they had a great time on the phone together. He then decided he did not want to go ahead with the name change. My son got so excited about regaining a relationship with his father and I continued to call him so they could talk on a regular basis. His birthday was two weeks ago and we had not heard a thing from his father for the two weeks prior. On my son's birthday, he waited and waited for his dad to call or send a message, not a thing was received. This has left my son devastated. I am so angry that he has walked out of my son's life not once but twice! My son still wants his name changed. How would I go about changing it on my own? Do I need to get sole legal parental rights or can I just go before a judge to grant me the rights to change his name?