Author
- John of Wales1
- John, Duke of Berry1
- Joseph ben Judah ibn Aknin1
- João Freire1
- Juan Félix de Rújula1
- Juan Ortiz Campoy1
- Juana I of Castile1
- Judah ben Saul ibn Tibbon1
- Julianus Pomerius1
- Julius II1
- Julius III1
- Jullien Gervais1
- Klaus von Stille1
- Kollegium Sankt Nikolaus1
- Konrad von Brundelsheim1
- Laurent d'Orleans1
- Leo III1
- Leo X1
- Leonardo Emo1
- Lope de Olmedo1