_Christian II OLDENBURG ___+
                                                            | (1178 - 1233)             
                            _John I OLDENBURG ______________|
                           | (1204 - 1270)                  |
                           |                                |_Agnes of ALTENA-ISENBURG _
                           |                                  (1166 - 1217)             
 _Christian III OLDENBURG _|
| (1245 - 1285)            |
|                          |                                 ___________________________
|                          |                                |                           
|                          |_Richeza of HOYA-STUMPENHAUSEN _|
|                            (1220 - 1270)                  |
|                                                           |___________________________
|                                                                                       
|
|--Otto VI OLDENBURG 
|  (1262 - 1348)
|                                                            _Burchard OLDENBURG _______+
|                                                           | (1175 - 1233)             
|                           _Heinrich IV OLDENBURG _________|
|                          | (1219 - 1270)                  |
|                          |                                |___________________________
|                          |                                                            
|_Hedwig of WILDESHAUSEN __|
  (1233 - 1314)            |
                           |                                 ___________________________
                           |                                |                           
                           |________________________________|
                                                            |
                                                            |___________________________