How do you handle it when you can’t agree AT ALL

Last pregnancy, my SO had ONE boy name and ONE girl name he would agree on. I reluctantly agreed on the girl name even though it wasn’t my favorite but I absolutely don’t want it this time. The boy name, I hated with a passion because I had a pedophile neighbor, that took photos of the neighborhood little girls while we played outside, with the same name. He kept telling me I’d get over it and he wants a son with that name. I said absolutely not because I’d always envision that man taking our pics while we played in the sprinkler, and he was super bitter about it and wouldn’t choose any other names.

When our son was born, he finally picked a name off of the list of nearly 100 names that I had put forward.

I honestly have no idea how we’re going to agree on another one.

I put forward sooooo many names last time and he put forward ONE of each.

What do you do when one parent is being insanely stubborn? I’ve been afraid to even bring it up yet this time