Name
- Olmius, Herman1
- Orsini, Anne Marie, née de la Trémoille, Princesse des Ursins, wife of Flavio Orsini, Duke of Bracciano1
- Oxenden, Errigo1
- Paleotti, Ferdinand, Marquis1
- Palumbara, Porzia Gabrielli Savelli1
- Parliament1
- Pastori Arcadi, I1
- Paulet, Hampden1
- Paulet, William, 3rd Marquis of Winchester1
- Penn, William, of Add MS 347271
- Permezzi, Giovanni, detto il poeta frascarano1
- Perry, Charles, Colonel1
- Phelps, Richard, Under-Sec for Northern Department1
- Piccolomini, Enea Silvio1
- Poley, Edmund, Envoy to Hanover, Zell and Wolffenbüttel1
- Puckering, Henry, Baronet, formerly Newton1
- Puckering, Thomas, 1591-1637, http://isni.org/isni/000000...1
- Ramaggini, Giovan Giuseppe, Abbate1
- Rawlinson, Richard, FRS1
- Roderigue1