Husband wants to name our kids after deceased family members

I love my husband and his family. He lost his cousin and brother within a year which really took a toll on him. We grieved together but I had to be extra strong because he grew up with both of them. This was 3 years ago. Our first born (girl) was named after his grandmother. I had a different name in mind but I knew how important it was to him. 2 weeks ago, we found out that our twins (I’m 19 weeks pregnant) will be a boy and a girl. He told me last night that he wants our son to be named after his brother, and our daughter after his cousin. I know that this is important to him but I can’t find the strength right now to tell him that I don’t want our next kids to be named after his deceased family members again. This is really frustrating me and being an emotional wreck, I actually cried about it this morning lol. Am I an asshole for being mad about this? I want to be supportive as he lost the people he was the closest to but I want my kids to have their own names!!!