Confused, am I the ass?

So I'm currently pregnant (high risk) & the father & I are no longer together. We had a name picked out but now at 8months pregnant he wants to change the baby's name. Back story is that he's told me he didn't want any more children, he didn't care what her name would be & has been disrespectful/distant this whole pregnancy. No this wasn't planned but in the yrs we've been together he's been trying to get me pregnant & I havent taken birth control for the last 2yrs for that reason. He's at the point where he's now accusing me of trapping him with this child (been together 8yrs). Every time I walk away, he comes back wanting to be a family smh. Now since I've basically been doing everything on my own since being 6 months pregnant he wants to start coming around. Am I wrong for not wanting to change her name for his convenience? He has other children from a previous marriage & this would be my first after 2 miscarriages (with him). He even asked after she comes will I plan to go back on bc? I'm also wondering why that should matter to him as well smh. I have no plans of anything outside of co-parenting with him. AITA?