Last name

Should I put my baby’s dads last name.? I’m due in April. We have been on and off mostly because of his toxic family he puts first. His mom and sister. His mom wanted me to abort and his sister said we weren’t ready n last month tried to drag me out of a car he got on top of me (she’s way bigger than me in regards to weight. Not trying to be mean) but once I started to defend myself n punch her she got off. He still speaks to them I thought he would be mad bc his baby could’ve gotten hurt but nope. He lives with his mom probably why he doesn’t say anything. He did tell them though that me and the baby come first now and then his family. I just don’t know if I should put his last name or no. I’m from Texas so idk does that affect anything.? Should I put both of ours.? He says that he does want to be in her life and if I don’t let him see her he will take me to court. I’ve never said I wasn’t anyways I told him what goes on between me n him is different but he is her dad and I won’t take that away from him and be bitter. He’s gonna be there in the hospital. We are currently trying to work things out in our relationship. I might go live with him at his parents until we save some money for our own place too.