| Conditions | Surname Options | Result |
| Parents have the same or different surnames and agree on their child's surname. | Child's surname will be as chosen by the parents regardless of the parents' surnames and can consist of a single surname or a hyphenated or combined surname. | Child and parents may or may not have the same surname. |
| Parents have different surnames but do not agree on their child's surname. | Child's surname will consist of both parents' surnames hyphenated or combined in alphabetical order. | Child has a hyphenated or combined surname made up of the parents' surnames. |
| Parents have the same surname but do not agree on their child's surname. | Child's surname will be the parents' surname. | Child and parents have the same surname. |
| One or both parents have a hyphenated or combined surname and want to give their child a hyphenated or combined surname. | Child's surname will consist of only one of the names from the surname of the mother which can be hyphenated or combined with only one of the names from the surname of the father. | Child has a hyphenated or combined surname made up of the parents' surnames. |
| Where only one parent completes and signs the Registration of Live Birth. | The child's surname will be the surname chosen by that parent and can consist of a single surname or a hyphenated or combined surname. | Child and parent may or may not have the same surname. |
| If a person who is not the child's parent completes and signs the Registration of Live Birth. | The child's surname will be the parents' surname, if they have the same surname. If the parents have different surnames, the child's surname will consist of both parents' surnames hyphenated or combined in alphabetical order. If only one parent is known, the child's surname will be that parent's surname. | Child has a hyphenated or combined surname of the child's surname will be the same as the parent's or parents' surname. |
