- Niccolò, Lapo di1
- Nicholas V, Pope, 1397-14551
- Nicholas, of Dinkelsbühl, approximately 1360-14331
- Nicolas d'Orbelles1
- Ninth century1
- Niẓām al-Mulk, 1018-10921
- Nobility of character1
- Nobility--Heraldry1
- Nofrio, Jacopo di1
- Norbert, of Xanten, Saint, approximately 1080-11341
- Northern France1
- Novitiate1
- Nukhbat al-fikar fī muṣṭalaḥ ahl al-athar (Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī)1
- Numerical division of sacred works1
- Numerology1
- Nuns1
- Oaths1
- Oaths (Islamic law)1
- Occasional verse1
- Occultism1