| Name | Meaning | Gender | Origin |
|---|
| Nicholas | victorious people | Male | Greek |
| Nick | Variation of Dominic, belonging to the Lord | Male | English |
| Norbert | blond hero | Male | |
| Norris | Caretaker | Male | |
| Nott | Hogwarts student.
| Male | |
| Nymphadora | after the Nymphadora Tonks character in Harry Potter | Unisex | |
| Ogden | from the oak valley | Male | English |
| Oliver | The olive tree. The biblical olive tree symbolizes fruitfulness and beauty and dignity. Extending an olive branch signifies an offer of peace.
| Male | Latin |
| Ollivander | | Unisex | |
| Orion | Son of Fire
| Male | Greek |
| Oswald | Divinely powerful
| Male | English |
| Peeves | | Unisex | |
| Percival | Hero of several Arthurian stories
| Male | |
| Percy | | Male | |
| Peter | A rock. Peter the biblical fisherman and apostle had impulsive nature and rocklike faith. In Catholic tradition he is the first pope.
| Male | Greek |
| Phineas | oracle; dark-skinned | Male | Hebrew |
| Pierre | A rock. Form of Peter.
| Male | |
| Pigwidgeon | | Unisex | |
| Potter | maker of drinking and storage vessels | Male | English |
| Quentin | Fifth.
| Male | Latin |
| Quirinus | | Unisex | |
| Reginald | powerful one | Male | English |
| Regulus | | Unisex | Hebrew |
| Remus | | Male | |
| Riddle | | Male | Hebrew |