_Billung of BILLUNG ___+
                                             | (0880 - 0967)         
                        _Hermann BILLUNG ____|
                       | (0900 - 0973)       |
                       |                     |_Ermangarde of NANTES _
                       |                                             
 _Bernard I BILLUNG ___|
| (0950 - 1010)        |
|                      |                      _______________________
|                      |                     |                       
|                      |_Oda of SAXONY ______|
|                        (.... - 0972)       |
|                                            |_______________________
|                                                                    
|
|--Thietmar BILLUNG 
|  (.... - 1048)
|                                             _______________________
|                                            |                       
|                       _____________________|
|                      |                     |
|                      |                     |_______________________
|                      |                                             
|_Hildegarde of STADE _|
                       |
                       |                      _______________________
                       |                     |                       
                       |_____________________|
                                             |
                                             |_______________________