| Nal | Champion | Boy | |
| Nanna | Brave | Girl | |
| Nikolaus | Victory of people | Boy | |
| Nils | Victory of people | Boy | |
| Njord | Strong, Vigourous | Boy | |
| Normand | North protection, North man | Boy | Norwegian |
| Odd | Point of a sword | Boy | |
| Oddmund | Point of a weapon, Protection | Boy | |
| Ola | Ancestor's descendent | Boy | |
| Olaf | Ancestor's descendent | Boy | |
| Olav | Ancestor's descendent | Boy | |
| Ole | Ancestor's descendent | Boy | |
| Oliver | Ancestor's descendent | Boy | |
| Olivia | Ancestor's descendent | Girl | |
| Oscar | Deer lover | Boy | |
| Oskar | Deer lover | Boy | |
| Otto | Wealth, Fortune | Boy | |
| Ove | Blade | Boy | |
| Oystein | Island stone | Boy | |
| Oyvind | Victory, Island, Wind | Boy | |
| Pal | Small, Humble | Boy | |
| Paul | Small, Humble | Boy | |
| Paula | Small, Humble | Girl | |
| Pauline | Small, Humble | Girl | |
| Peder | Rock, Stone | Boy | |
| Peer | Rock, Stone | Boy | |
| Per | Rock, Stone | Boy | |
| Peter | Rock, Stone | Boy | |
| Petra | Rock, Stone | Girl | |
| Petter | Rock, Stone | Boy | |
| Philip | Friend of horses | Boy | |
| Ragna | Advice, Counsel | Girl | |
| Ragnhild | Advice, Counsel | Girl | |
| Rebekka | One who snares or traps | Girl | |
| Regina | Queen | Girl | |
| Roald | Famous ruler | Boy | |
| Roald | Famous Ruler | Boy | Norwegian |