Author
- Hugh Ripelin of Strasburg1
- Hugh of Fouilloy1
- Hugh of Saint-Cher1
- Ibn al-Qasim1
- Immanuel Bonfils1
- Isaac Israeli ben Joseph1
- Isaac Israeli ben Solomon1
- Isaac ben Joseph of Corbeil1
- Isaiah di Trani1
- Ivo of Chartres1
- Jacob ben Jacob, ha-Kohen, -approximately 12701
- Jacobo Bellenden1
- Jacopone da Todi1
- James of Viterbo1
- Jean Gerson1
- Jean Marot1
- Jean de Malian1
- Jean de Roquetaillade1
- Jewish Community of Carpentras, France1
- Joan Martines1