- Northern France1
- Notaries1
- Nouel, Jacques, 1551-1
- Novi, Lisa di1
- Nukhbat al-fikar fī muṣṭalaḥ ahl al-athar (Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī)2
- Numbers (Provenance)1
- Numerical division of sacred works1
- Nuti, Giovanni, 1952-1
- Nādir Shāh, Shah of Iran, 1688-17475
- Nāṣir al-Dīn Shāh, Shah of Iran, 1831-18961
- Oaths2
- Ochoa family1
- Old age1
- Olive oil industry1
- Orden de Santiago2
- Order of the Golden Fleece1
- Orders of knighthood and chivalry2
- Ordinances, Municipal1
- Ordnance--Manufacture2
- Oria, Johannes d'1