_Orso ORSINI ____________+
                                            |                         
                       _Napoleone ORSINI ___|
                      |                     |
                      |                     |_Jacopa SAVELLI _________
                      |                                               
 _Giacomo ORSINI _____|
|                     |
|                     |                      _________________________
|                     |                     |                         
|                     |_____________________|
|                                           |
|                                           |_________________________
|                                                                     
|
|--Francesco ORSINI 
|  
|                                            _Matteo Rosso II ORSINI _+
|                                           | (.... - 1282)           
|                      _Riccardo ORSINI ____|
|                     | (.... - 1309)       |
|                     |                     |_________________________
|                     |                                               
|_Matteuccia ORSINI __|
  (1255 - ....)       |
                      |                      _________________________
                      |                     |                         
                      |_____________________|
                                            |
                                            |_________________________