_Giacinto ORSINI ____+
                                            | (1014 - 1060)       
                       _Bobone ORSINI ______|
                      | (1048 - 1106)       |
                      |                     |_____________________
                      |                                           
 _Pietro ORSINI ______|
| (1075 - 1159)       |
|                     |                      _____________________
|                     |                     |                     
|                     |_____________________|
|                                           |
|                                           |_____________________
|                                                                 
|
|--Bobone ORSINI 
|  (1100 - ....)
|                                            _____________________
|                                           |                     
|                      _____________________|
|                     |                     |
|                     |                     |_____________________
|                     |                                           
|_____________________|
                      |
                      |                      _____________________
                      |                     |                     
                      |_____________________|
                                            |
                                            |_____________________