Sometimes guys just need to stew on a name a bit too. We were butting heads and at a stand still, especially about the girl name, which I was stuck on. The boy name was easy, I mentioned I liked the name Jackson and he said "I can live with that", Liam was #2 on my list, but he hated it at first. Then I said "What about Jackson Liam" and he said he liked it a lot. Later he said he loved the name Liam. LOL
Girl name.... LOVED LOVED LOVED Callie when I heard it on Gray's Anatomy, but I think it is too cutsie for an adult. Did some research, learned Callie's name is Calliope.

Tried out other names that could use the nn Callie, but I was stuck on Calliope. Mentioned it to hubby and he said no way, no how, NEVER. There was a character on his video game, God of War with that name. Tried out other Callie names and nothing did it for me. Started talking to him about Calliope in Greek Mythology, other NNs we could use, and Saint Calliope. It grew on him and now he loves it. The mn just came to me and he loved it too after trying out a ton of others, so our girl name will be Calliope Celeste. AND as a bonus, my mom hates both of our names... woohoo, two birds, one stone. lol (joking)
So maybe just back off a bit and let him work things out and maybe you will both find a name you love.