You can change your first name, middle name and last name. Note that the middle name is not a first name. Names which can be used as a surname, may also be taken as a middle name.
When the Tax Administration has sent you a request to select a name for your baby, you can report it online. This only applies to first-time name choice.
If possible, parents should agree privately on child maintenance payments. However, guidance on how much child maintenance should be paid is available via an online calculator from the Norwegian Labour and Welfare Administration (NAV).