What would you do ?

My babys daddy wants to name the baby after him if it’s a boy, I find out in a week what I’m having. 😅 I told him straight up I wasn’t giving him his first name, but would give him his middle name, Augustus. I like the name. Kinda. Not really. I mean I’m the one carrying it for 9 months and I’m giving it his last name which I feel is enough 😅😅 do I tell him and bum him out for a while or just wait for the birth certificate and write what I want? We’re not a couple.