Name
- Bonelli, Michele, Cardinal1
- Braganza, Theodosios II., Duke of Braganza1
- Cardona y Cordova, Antonio Fernandez, Duke of Sessa, Soma and Baena, Spanish Ambassador at Rome1
- Castro, Family1
- Charles II, Duke of Lorraine1
- Cologne, Archbishop Elector of. Ernest, Duke of Bavaria1
- Colonna, Family1
- Delanges, Giuseppe Estienne, Deputy of Marseilles and correspondent of Pietro la Rocca, fl 15941
- Dovara, Luigi, correspondent of Antonio Fernandez de Cardona y Cordova, Duke of Sessa, fl 15921
- Francis Maris II, Duke of Urbino1
- Gonzaga, Vespasiano, Duke of Sabbionetta, alias Gonzaga-Colonna, condottiero, politician and patron of the arts, 1531-15911
- Guidobaldo II, Duke of Urbino1
- La Rocca, Pietro, Ambassador of the Knights of Malta at Rome1
- Lorraine, Charles, Duc de Mayenne, 1554-16111
- Mansfeld, Peter Ernst von, Count1
- Mantua, Duchy and Marquisate of. Vincenzo I1
- Marchesi, Marcello1
- Medici, Ferdinand I, Grand Duke of Tuscany, nobleman, 1549-16091
- Orano, Francisco1
- Orsini, Virginio, Duke of Bracciano, of Add MS 284141