Dukes of Marsi Duchi di Marsi Records #2 Holders Family filter On/Off 2 Prospero Colonna, 12° Principe di Stigliano, Principe di Aliano, 2° duke dei Marsi, marquess of Castelnuovo * 1938 Odoardo Colonna, duke of Marsi * c. 1414 Corrections and Updates To suggest a correction or an update. Click Here