Author
- Henry Hakesalt3
- Henry Suso3
- Hubert de Burgh, 1st Earl of Kent3
- Isaac Newton3
- Ivo of Chartres3
- Jacobus de Cessolis3
- Jacobus de Teramo3
- Jalaluddin al-Mahalli3
- James of Milan3
- Jayakr̥ṣṇa3
- John Cassian3
- John Halgren of Abbeville3
- Juana I of Castile3
- Kamalakara3
- Kapila3
- Keśavamiśra3
- Lakṣmīdhara3
- Laugākṣi Bhāskara3
- Leo Archpriest3
- Leon Battista Alberti3