_Arnulf I FLANDERS _____+
                                              | (0890 - 0965)          
                       _Baldwin III FLANDERS _|
                      | (0940 - 0962)         |
                      |                       |_Adele of HERBERTIAN ___+
                      |                         (0910 - 0960)          
 _Arnulf II FLANDERS _|
| (0961 - 0987)       |
|                     |                        _Hermann BILLUNG _______+
|                     |                       | (0900 - 0973)          
|                     |_Matilda of BILLUNG ___|
|                       (0935 - 1008)         |
|                                             |_Oda of SAXONY _________
|                                               (.... - 0972)          
|
|--Baldwin IV FLANDERS 
|  (0980 - 1035)
|                                              _Adalbert I of IVREA ___+
|                                             | (.... - 0928)          
|                      _Berengar II IVREA ____|
|                     | (0900 - 0966)         |
|                     |                       |_Gisela of UNRUOCHINGI _+
|                     |                         (0876 - 0912)          
|_Rozala of IVREA ____|
  (.... - 1002)       |
                      |                        _Boso BOSONID __________+
                      |                       | (.... - 0940)          
                      |_Willa of BOSONID _____|
                        (0911 - 0970)         |
                                              |_Willa of WELF _________+
                                                (0900 - 0936)