Name
- Nicholas, Praepositus1
- Odoardo, Duke of Parma1
- Orlandis, Hieronymus1
- Otloh, Monachus1
- Palotta, Giovanni Battista, Cardinal1
- Pappenheim, Gottfried Heinrich, Count1
- Peraugustinus, Antonius, Jurisconsultus1
- Petrarca, Francesco, poet, 1304-13741
- Petrucci, Antonello, Secretary to Ferdinand of Aragon1
- Philip III, Duke of Burgundy, 1396-14671
- Piedmont, François1
- Pio, Carlo, Cardinal1
- Platearius, Johannes, physician of Salerno1
- Plato, 427 BC-347 BC1
- Plinius Caecilius Secundus, Caius, also known as Pliny the Younger, 61-c 1131
- Politiano, Angelo, of Add MS 211871
- Pomponianus, Aurelius Caecius1
- Pontano, Giovanni Gioviano, Neapolitan Minister of State, 1426-15031
- Pontenigo, Cominus1
- Querini, Marino1