Can you tell him to wait on the name announcement for a day or so after the birth? He doesn't need to be supplying a name to family and friends, won't kill anyone to wait for a bit and in the meantime they can be happy knowing the gender and that everyone is healthy.

I agreed with DH's name for DD1 and I don't really like it. I picked two girls names for DD2 that we both agreed on and waited to see what hair colour she had to decide which one to use lol. It seemed like good logic at the time