Why won't he even discuss names with me?

So I'll be 21 weeks tomorrow, and dh absolutely refuses to discuss baby names with me. If I suggest anything he immediately says he hates it. He refuses to come up with even one name that he himself likes. Not even one. Some days if I try to suggest something he just gets angry and says he doesn't want to talk about it. I'm feeling a really strong desire to have a working list of names so that I can see how I feel about them fitting with my sense of the baby as I get to know him growing inside me. I'd be fine not having a name totally picked out when he comes, I just want to narrow it down a bit. I really tried not to discuss it too much with him at all in the beginning. I figured he was just trying to be cautious about getting too attached to the baby early on since I had a miscarriage at almost 7 weeks right before this pregnancy. And then I figured that he didn't want to waste a lot of energy picking a name before we knew what we were having. But now we know it's a boy and we're pretty far into the pregnancy and he still won't talk about it. And I feel so frustrated. I want so badly to talk about names with him, it's a really fun part of being pregnant for me, and I feel like he's stealing my joy. Also it's so frustrating that he can find something negative to say about every single name. He says he doesn't like Beckett because it's the name of a baseball card pricing book(?) or something like that. I'm not even sure why that makes it a bad name. He likes baseball and baseball cards. It's not like it has a negative connotation. Same thing with Avery. He says he doesn't like it because it's the name of a company that makes labels. He doesn't like Dashiell because he thinks it sounds like Dachshund. The both start with "D" and have two syllables, that's where the similarity ends as far as I'm concerned. He has all these stupid ridiculous rules too. Like we can't have any names that start with "M" or "J" because those are our first initials and since dd already has a "J" name he doesn't want any body to think we're trying to keep everyone's initials the same on purpose. I mean really? Who cares? At this point in my pregnancy with dd we pretty much had a name picked out, so that also makes it harder for me to understand why he's being this way this time. I've told him that it really bothers me that he shoots down my name ideas, but doesn't make any suggestions of his own. He says he doesn't want to waste what little free time he has going through name books. He says we still have plenty of time, which is true, I don't need to have "the" name picked out, but I would like to feel like we're making a start. Getting a list together at least. Or if he would just give me a couple names he liked so I have an idea of the style he likes I could search out names with a similar style. But he claims he doesn't LIKE any names. I understand not having found a name you LOVE, but you don't LIKE a single name. If he doesn't like any names, then why should I bother trying to find one he does like. Why can't I just pick a name I love. He is obviously not into names the way I am, so why can't I just pick the name by myself? I just feel like I'm d***ed if I do, and d***ed if I don't with him. I just feel like he's going to play this game until the baby comes and then we'll settle for some name that neither of us loves because we're just desperate to call the baby something other than "hey you." It's not even fun thinking of names alone or with other people because I know that if I start liking a name my husband will hate it. It honestly feels like he chooses to hate the most, the names I like the best. No point getting attached to anything. Anyway have I mentioned I'm frustrated :