Scribe
- Johannes van der Kemp1
- Johannes, de Beylario1
- John Capgrave1
- John Shirley1
- John Waller1
- John de Beauchesne1
- Juan de la Mote1
- Justinus of Master Stephanus1
- Kaspar Ytelhuser1
- Katherina Mast1
- Laurence Nowell1
- Leonhard Bernecker1
- Lorenzo da Pisa1
- Ludovico Vicentino degli Arrighi1
- Luxeuil Abbey1
- M. Gordone1
- Marchiono de Marchioni1
- Marcus Lauredano (notary)1
- Martino Bernardinis1
- Master of the Ottoboni Livy1