Is there anything else I can do in addition to getting a restraining order against abusive ex boyfriend in NJ state

My rights / Child's father rights: I need to briefly explain my situation so you get the full idea. I am a single mother of a 2 year old toddler. My son's father and I dated for months before I got pregnant. I was living in VA with him. While I was pregnant he became physically abusive with me. I was 6 months pregnant when I relocated back to Bayonne NJ. I gave birth to my son in NJ. When my son was 3 months old I went back to VA to try and make our family work. Which it didnt again I moved back to NJ. For the last year and a half he's been in and out of my son's life. He'll come around when he feels like it. He lives in VA but is moving back to NJ in 2 weeks. Recently I started dating someone and my son's father is acting out. He has threatened to kill me / hurt me. I am going to file a restraining order tomorrow. I need to know what else I could do. He is not on my son's birth certificate nor does my son have his last name. - Is this your question? Add additional information