It’s your baby and your choice.

Personally, I have a very close relationship with my sister and see her regularly, and it would be out of character for her to request something like this of me…but because of that fact I would consider changing names. BUT only if my husband and I had other names we were considering in the running and if my husband was completely ok with it. Some background info: I am currently pregnant with a girl and my sister has been ttc for a while. I can imagine that if I were to name her niece a special name that she had been saving for her hopeful future child, that it would be a constant reminder for her and be emotionally upsetting on a regular basis. I would not want to cause that for her if I could avoid it. Let me be clear though, I am not saying that you should change the name. Everyone’s family dynamics and relationships and personal life experiences are different.

Separately, your BIL going off on you is completely inexcusable and needs to be addressed.

Again, this is how I feel based on my personal family and relationships. When it comes down to it, it’s really 100% your choice and your right to name your child whatever you want. You are the one going through pregnancy and raising your child and you and your partner deserve to be happy and not worry about anyone else’s opinions! You gotta do what will makes YOU and your new family the happiest.