_Frederick III HOHENSTAUFEN _+
                                                      | (1122 - 1190)               
                              _Henry VI HOHENSTAUFEN _|
                             | (1165 - 1197)          |
                             |                        |_Beatrice I of IVREA ________+
                             |                          (1143 - 1184)               
 _Frederick II HOHENSTAUFEN _|
| (1194 - 1250)              |
|                            |                         _____________________________
|                            |                        |                             
|                            |_Constance of SICILY ___|
|                              (1154 - 1198)          |
|                                                     |_____________________________
|                                                                                   
|
|--Constance of HOHENSTAUFEN 
|  (1230 - 1307)
|                                                      _____________________________
|                                                     |                             
|                             ________________________|
|                            |                        |
|                            |                        |_____________________________
|                            |                                                      
|_Bianca Lancia of AGLIANO __|
  (1210 - 1246)              |
                             |                         _____________________________
                             |                        |                             
                             |________________________|
                                                      |
                                                      |_____________________________