_Ulf THORGILSSON ________________+
                                                        | (.... - 1026)                   
                                  _Sweyn II ESTRIDSEN __|
                                 | (1019 - 1076)        |
                                 |                      |_Estrid Svendsdatter KNÝTLINGA _+
                                 |                        (0990 - 1057)                   
 _Canute IV Svendsson ESTRIDSEN _|
| (1042 - 1086)                  |
|                                |                       _________________________________
|                                |                      |                                 
|                                |______________________|
|                                                       |
|                                                       |_________________________________
|                                                                                         
|
|--Cecilia Knudsdatter of ESTRIDSEN 
|  (1081 - 1130)
|                                                        _Baldwin V FLANDERS _____________+
|                                                       | (1001 - 1067) m 1028            
|                                 _Robert I FLANDERS ___|
|                                | (1035 - 1093)        |
|                                |                      |_Adela of CAPET _________________+
|                                |                        (1009 - 1078) m 1028            
|_Adela of FLANDERS _____________|
  (1064 - 1115)                  |
                                 |                       _Bernard II BILLUNG _____________+
                                 |                      | (0995 - 1059)                   
                                 |_Gertrude of BILLUNG _|
                                   (1030 - 1113)        |
                                                        |_Eilika of SCHWEINFURT __________+
                                                          (1005 - 1059)