Author
- Haimo of Auxerre1
- Hieronymus de Viterbo1
- Hugh Ripelin of Strasburg1
- Hugh of Balma1
- Hugh of Fouilloy1
- Hugh of Saint Victor1
- Immanuel Bonfils1
- Innocent III1
- Innocent IV1
- Innocent XI1
- Isaac Alfasi1
- Isaac Israeli ben Joseph1
- Israel Sarug1
- Jacob Israel Karmi1
- Jacob Saphir1
- Jacob ben David ben Yom Tov1
- Jacobus de Cessolis1
- Jacopone da Todi1
- Jacques de Vitry1
- James of Viterbo1