Name
- Henry, of Poland1
- Innocent IX, Pope1
- Inquisition1
- Ivan IV, of Russia1
- John II, Counts Palatine of Zweybrück1
- La Rocca, Pietro, Ambassador of the Knights of Malta at Rome1
- Leo XI, Pope1
- Lopez de Soto, Pedro1
- Lorraine, Charles, Duc de Mayenne, 1554-16111
- Lorraine, Henri, Duc de- Guise1
- Mansfeld, Peter Ernst von, Count1
- Mantua, Duchy and Marquisate of. Vincenzo I1
- Marchesi, Marcello1
- Mary I, of England1
- Mascardi, Agostino, Chamberlain to Urban VIII1
- Maschio, Bernardo, Agent del Duque de Urbino1
- Matthias, Holy Roman Emperor, also Matthias II, King of Hungary, 1557-16191
- Maximilian II, Emperor of Germany1
- Medici, Ferdinand I, Grand Duke of Tuscany, nobleman, 1549-16091
- Medicici, Pietro de', Son of Cosmo I, Spanish General1