- Nofrio, Jacopo di1
- Norbert, of Xanten, Saint, approximately 1080-11341
- North Africa1
- North America--New France1
- North, Edward North, Baron, 1496?-15641
- Northern Europe1
- Northwest Africa--Atlantic Coast1
- Notaries (Canon law)1
- Notaries (Roman law)1
- Nouel, Jacques, 1551-1
- Novi, Lisa di1
- Novitiate1
- Nuns1
- Nuti, Giovanni, 1952-1
- Obligations (Law)1
- Occasional verse1
- Ochoa family1
- Octoechos (Orthodox Eastern Church)1
- Odilo, Saint, Abbot of Cluny, 962-1048 or 10491
- Odo, Saint, Abbot of Cluny, approximately 879-9421