Re: In-Laws deciding name…
As several others have mentioned, this is totally unacceptable behavior from him! You’re the one going through pregnancy, giving birth, and I imagine you’ll the one who’ll take care of the baby most of the time. And this is your 1st child. For him to DICTATE that you have absolutely no involvement in what the child will be referred to the rest of his life is beyond ridiculous! It one thing that he, as the father, doesn’t give a sh*t. But he has no right to tell you to “stay out of it”!
You really need to put your foot down on this. 
I know it seems like 1 issue…but you should not let him disrespect you, and have total disregard for your feelings when it comes to your child on this critical issue. This will only set the “stage” for future behavior.
Talk to the FIL yourself. And tell your husband that he can do whatever he likes…but that you plan on being involved in EVERY aspect of your child life…including his name!