This is a problem with us, too. With DD(#1) we quickly agreed on a boy name, hadn't a clue for a girl, found out she'd be a girl, and then went crazy going through megababynamebooks looking for something. DH trashed every name I suggested he didn't want. He ultimately picked DD's name.
Now, we found out LO is also a girl, and for every name I kinda liked that came up under DD's picking, I just remember why he rejected it. It wasn't like we just loved one so much that we didn't consider others, he thrashed everything he didn't like.
We have a few ideas now, ones that didn't really come up with DD#1, and I already know his fave (not mine), and I get to pick (our agreement after DD#1 since he picked her name and I did the middle). But he's already doing the same thing--trashing everything else, including intentionally mispronouncing the name I like (it's not hard) and pretending that he just can't quite get it.
I might just smack him.