Baby name fight!

Me and my husband are expecting. He already has two girls and a boy. This will be my first child. On my side of the family there is only girls. Lately we have been talking about names for a boy hoping that's what we will be having. But when I ask about a girls name just in case it's a girl he refuses to have a word about it becuase he doesn't want a girl as if I had control. Any suggestions on how I can get him to talk about girls names??