_Maurice I OLDENBURG _+
                                                             | (1145 - 1211)        
                                  _Christian II OLDENBURG ___|
                                 | (1178 - 1233)             |
                                 |                           |_Salome of WICKRATH __
                                 |                             (1150 - 1215)        
 _John I OLDENBURG ______________|
| (1204 - 1270)                  |
|                                |                            ______________________
|                                |                           |                      
|                                |_Agnes of ALTENA-ISENBURG _|
|                                  (1166 - 1217)             |
|                                                            |______________________
|                                                                                   
|
|--Otto II OLDENBURG 
|  (1253 - 1303)
|                                                             ______________________
|                                                            |                      
|                                 ___________________________|
|                                |                           |
|                                |                           |______________________
|                                |                                                  
|_Richeza of HOYA-STUMPENHAUSEN _|
  (1220 - 1270)                  |
                                 |                            ______________________
                                 |                           |                      
                                 |___________________________|
                                                             |
                                                             |______________________