Changing a Child's Name: Can You Change a Child's Name Without Notifying the Father

I am in the same boat. My child’s father never signed the birth certificate or petition of paternity or anything. I would like to change my child’s last name to mine but can I without notifying him? He has no responsibility or relationship with my child. I’m in California

Changing a Child's Name: Can You Change a Child's Name Without Notifying the Father