I am an unmarried mother of two in Ohio. I would like to change both of their names back to my last name. The father of my daughter (2yrs.) does not pay child support and rarely visits or calls. Since we were never married do I need his permission to file a petition for name change? He did sign the birth certificate. He does not want me to change the name, but I do not feel like he should have a say so since he is not emotionally or financially supportive in any way. It is almost the same situation with my son's(10yrs.) father. Except he is completely absent. I would not have the first idea where to look for him and he is over thirty thousand dollars behind in child support.