_Girodano ORSINI _____+
                                                  |                      
                       _Francesco ORSINI _________|
                      | (1353 - 1404)             |
                      |                           |_Anastasia of ORSINI _+
                      |                             (1333 - 1353)        
 _Orso ORSINI ________|
| (1372 - 1424)       |
|                     |                            ______________________
|                     |                           |                      
|                     |_Constanza ALDOBRANDESCHI _|
|                       (1358 - ....)             |
|                                                 |______________________
|                                                                        
|
|--Francesca ORSINI 
|  
|                                                  ______________________
|                                                 |                      
|                      ___________________________|
|                     |                           |
|                     |                           |______________________
|                     |                                                  
|_Lucrezia of CONTI __|
  (1375 - 1427)       |
                      |                            ______________________
                      |                           |                      
                      |___________________________|
                                                  |
                                                  |______________________