I dont know who my sons father is and he is not on the birthcertificate can I change his name when I change mine
You would still need to file a petition for name change and give notice. In your case probably notice by publication. Odds are pretty high though that you petition will not be denied.
Employment / Labor Attorney
Yes you can. Whose name is on the child's birth certificate? You will need to file a name change petition with the Superior Court in order to do a legal name change. You will also need to do a publication in a legally certified court newspaper. There will also be a court hearing. Feel free to call my office for a free consultation. You can also call the Superior Court in the county you live in to obtain more information.
20955 Pathfinder Rd., Suite 100
Diamond Bar, CA 91765