Name Change After Divorce

Does anyone know how to handle this? I have a son that has my ex-husband`s last name. When we divorced I kept my ex-husband`s last name. Seven years later I remarried, but got divorced again, with no children. I changed my last name to my maiden name. My son doesn`t like having a different last name then mine. Should I have my maiden name added to my son`s, or can I use my maiden name and my ex-husband`s last name? If I use my ex-husband`s last name and my maiden name, what order do I write it in?