What is needed to change my grandson's last name to our last name?

Full question:

I have legal custody of my minor grandson for 6 years. He wants and we would like to change his last name to ours as his father does not support or have any contact with him. He only occupied a home with him for six weeks. My Grandson is 9 and has lived with us for all those years, but we have had custody for 6 years. His mother is in agreement with us. What can we do?

FAQs

A judge can order a name change for a child if it is deemed to be in the child's best interest. Generally, both parents must agree to the change, or the parent seeking the change must demonstrate that it serves the child's welfare. If you have legal custody and the other parent is absent, you may have a stronger case for the name change.