Author
- Joseph ben Abraham Gikatilla1
- Josephus1
- Joshua ben Israel Benveniste1
- José Antonio de Alzate y Ramírez1
- José Romero de Tejada y Artacho1
- Juan Antonio de Hozes Sarmiento1
- Juan Félix de Rújula1
- Juan Vicente de Güemes, 2nd Count of Revillagigedo1
- Judah Leib Prossnitz1
- Judah Rosanes1
- Kahvecizâde, Ahmed bin Hüseyin1
- Kalyanamalla1
- Kamal al-Din al-Ghazzi1
- Kamal al-Din ibn al-Humam1
- Kamalākara Bhaṭṭa1
- Kamalākarabhaṭṭa1
- Kamāl aldaayn albakry1
- Kanjāwī, Jibrīl ibn ḥasan, 1351 or 21
- Kanroji Motonaga1
- Kanō Gensen1