Author
- Henry of Langenstein2
- Henry of Segusio2
- House of Gondi2
- House of Requesens2
- Innocent V2
- Jacobus de Cessolis2
- Jacopo Piccolomini-Ammannati2
- Jacopone da Todi2
- James of Lausanne2
- Jean de Roquetaillade2
- Joannes Oliva2
- Johann Herolt2
- Johannes Nider2
- John Burgh2
- John Cassian2
- John Halgren of Abbeville2
- John Wycliffe2
- John XXII2
- John of Genoa2
- Jordan von Quedlinburg2