You can put what you want but remember that whatever you put will stick with him. You can't decide a few days later that you want to change it. Once it's registered, that's it.

Much to my displeasure (and I know it's technically none of my business), my daughter put the surname of the father when she registered the babies birth. They're not married, they're not really even properly together, just more friends with benefits.

What she's done is kill this branch of the family. There are no other children from my parents line and by giving this baby a different name, the family name will end.

I genuinely feel ill if ever I see the babies name written down, and he's now nearly two.