Myself and my ex both decided to double barrel our surnames for our daughter before she was born (both individually long - along the lines of Middleton - Chadwell) Upon registering the birth he seemed shocked I was going through with it as he had thought Id give in and just go with his. I didnt because a) we weren't married and i kind of knew it would never happen b) he had other children from a previous marriage with solely his name and c) Im proud of my surname.
When our DD was born and people asked her name, he would tell them her full first and surname, followed by but it will only be Chadwell when she starts school! This really pissed me off as he had never discussed this with me.
I left him, and have been and will continue to raise her by myself. When asked her name she says x Middleton.
I know I need his permission. He will probably sulk but sign the forms if asked, but would I be unreasonable to suggest it?
Her surname has a hyphen in it so i believe that may complicate just dropping the hyphen without involving deed poll.
Sorry for the long post x