Author
- Johannes Tostius1
- Johannes von Kastl1
- John Frederick II of Saxony1
- John of Ibelin1
- John Dokeianos1
- Juan López Ossorio1
- Juan Vicente de Güemes, 2nd Count of Revillagigedo1
- Juan de Foxá1
- Karakaşzade Ömer1
- Karaçelebizade Abdülaziz1
- Kaśīnātha Tāmūlī-Phukana1
- Khalīl ibn Shāhīn1
- Khālid ibn ʻAbd Allāh al-Azharī1
- Kingdom of France1
- Kulaynī, Muḥammad ibn Yaʻqūb, -941?1
- Kâtip Çelebi1
- Köstendilli Süleymân Şeyhi1
- Kāśīnātha Upādhyāya1
- Leonhard Freisleben1
- Levi, Yosef, 18th century1