Baby name spat

So my boyfriend said that he wanted to name the baby and that the baby needed to have his last name mind you he didn’t want the baby at first  I said OK you can name the baby, but then I found out I was having mo/di twins and now he thinks he should be able to name both babies. I think he should only be able to name Baby A he also said that if it was two girls, he don’t care about the names, but if it is Boys, he wants a junior and the other one named similar  he has picked out girl names, but most of them are ugly the reason why he doesn’t care about the girl names is because he already has daughters, but he only has one son

Tokyo, Berlin, Denver Nairobi those are the girl names

he picked… Ellis Nathaniel and Nathan Elliott is what I picked for boy names and he said hell no to the boy names and I said well that’s too bad and now he has an attitude  I honestly feel like I shouldn’t let him name any of the babies because after all, he didn’t want a baby in the first place and I really don’t care about him trying to come around to wanting the babies now that I’m having twins I don’t think that I’m being mean  none of these names are set in stone after all, we still don’t know the gender