Scribe
- Isidore of Kyiv1
- J. Clynton1
- Jacobus de Mutina1
- Jean d'Aussert1
- Johannes de Camenago1
- Johannes de Kuppferberg1
- Johannes de Tossens1
- Johannes of Regensburg1
- John Capgrave1
- John Clerk1
- John Shirley1
- John Waller1
- Justinus of Master Stephanus1
- Katherina Mast1
- Laurenziano Leone1
- Ludovico Vicentino degli Arrighi1
- Luxeuil Abbey1
- Master of the Ottoboni Livy1
- Masullus1
- Michael Papadopoulos1