Author
- Jerónimo Román y Zamora1
- Jewish Community of Amsterdam, Netherlands1
- Jewish Community of Padua, Italy1
- Joannes de Crivelli1
- Johannes de Thurocz1
- John Gower1
- John Tiptoft, 1st Earl of Worcester1
- John Dokeianos1
- Juan López Ossorio1
- Judah Halevi1
- Jörg Muelich1
- Karakaşzade Ömer1
- Kaśīnātha Tāmūlī-Phukana1
- Khālid ibn ʻAbd Allāh al-Azharī1
- Kâtip Çelebi1
- Kāśīnātha Upādhyāya1
- Laurent d'Orleans1
- Leonardo Loredan1
- Leonhard Freisleben1
- Lescut1