_Ariberto ORSINI ____+
                                            | (0655 - ....)       
                       _Costanzo ORSINI ____|
                      | (0680 - 0740)       |
                      |                     |_____________________
                      |                                           
 _Constantino ORSINI _|
| (0705 - ....)       |
|                     |                      _____________________
|                     |                     |                     
|                     |_____________________|
|                                           |
|                                           |_____________________
|                                                                 
|
|--Orso ORSINI 
|  (0840 - ....)
|                                            _____________________
|                                           |                     
|                      _____________________|
|                     |                     |
|                     |                     |_____________________
|                     |                                           
|_____________________|
                      |
                      |                      _____________________
                      |                     |                     
                      |_____________________|
                                            |
                                            |_____________________