Author
- Humbert of Romans1
- Iachetus Italianus1
- Iacobo Cattaneo Lagomarsino1
- Igreja e Convento de Santa Maria de Aguiar1
- Ildibrandinus1
- Immanuel Bonfils1
- Innocent VIII1
- Isaac ben Joseph of Corbeil1
- Isaiah di Trani1
- Jacob ben Jacob, ha-Kohen, -approximately 12701
- Jacobo Bellenden1
- Jacobus Balbi1
- Jacopo Nannis de Piccolomini1
- Jacopo Piccolomini-Ammannati1
- Jacques Lempereur1
- Jean Carteron1
- Jean de Malian1
- Joachim Bendel1
- Joan Martines1
- Joanna I of Naples1