DD1- my surname. I told her dad children only get surnames of their father when they are married and my view wasn't changing. I was happy to change ours both when we married. He didn't care much either way. We separated when DD1 was 4, met new partner and conceived DS1, was undecided but desperately wanted him to have my name until married, like my daughter. He'd talked me out of it and into giving him his surname but then he did me a favour and left me without notice or reason 8 weeks ago. I'm full term today and when born, DS1 will have my last name like the rest of my little family. :)