Name
- Medici, Vincenzo de', Florentine agent in Naples1
- Mello, Francisco, Conde de Asumar1
- Mexia Felipez de Guzman, Diego, Marqués de Leganes; Duque de San Lucar1
- Millini, Giovanni Garzia, Cardinal1
- Minucci, Giovanni, Secretary of Prince Mattias de' Medici1
- Modena and Ferrara, Duke of1
- Monte, Francesco Maria del, Cardinal1
- Monte, Francesco del, Captain-General of the Infantry in Tuscany1
- Montemagni, Desiderio, Secretary of Card. Giovanni Carlo de' Medici1
- Nomi, Alessandro, Florentine Secretary of War1
- Orsini, Virginio, Duke of Bracciano, of Add MS 487721
- Pandolfini, Carlo, Knight of St John of Jerusalem1
- Pandolfini, Domenico, Florentine Secretary of War1
- Paule, Antonio, Grand Master of the Order of St John1
- Penso Vega, Joseph, at Livorno1
- Philip III, King of Spain1
- Philip IV, of Spain, 1605-16651
- Plessis, Armand Jean, Duke of Richelieu, cardinal and statesman, 1585-16421
- Portugal, Diego, Conde de Jelues1
- Pucci, Alessandro, Vicar of Florence; Apostolic Protonotary1