- Marini, Nicola Antonio1
- Maro, Guglielmo1
- Marriage customs and rites, Medieval1
- Martini, Giovanni1
- Martini, Girolamo1
- Martino, Barone di1
- Martino, Odino S., active 15th century1
- Martino, Vanni di1
- Mary Magdalene, Saint1
- Massaran, Isaac de1
- Massi, Francesca1
- Materia medica, Vegetable1
- Mattei, Teo1
- Matteo, Bernardo di1
- Matteo, Giovanni di1
- Matthei, Bernardino1
- Maurice, Saint, -approximately 2871
- Maximian, Emperor of Rome, approximately 240-3101
- Mecco, Francesca di1
- Mecco, Xalento di1