_John I OLDENBURG ___________________+
                                                 | (1204 - 1270)                       
                       _Christian III OLDENBURG _|
                      | (1245 - 1285)            |
                      |                          |_Richeza of HOYA-STUMPENHAUSEN ______
                      |                            (1220 - 1270)                       
 _John II OLDENBURG __|
| (1260 - 1314)       |
|                     |                           _Heinrich IV OLDENBURG-WILDESHAUSEN _+
|                     |                          | (1219 - 1270)                       
|                     |_Hedwig of WILDESHAUSEN __|
|                       (1233 - 1314)            |
|                                                |_____________________________________
|                                                                                      
|
|--Christian IV OLDENBURG 
|  (1287 - 1334)
|                                                 _Otto I WELF ________________________+
|                                                | (1204 - 1252) m 1228                
|                      _John WELF _______________|
|                     | (1242 - 1277)            |
|                     |                          |_Matilda of ASCANIA _________________+
|                     |                            (1210 - 1261) m 1228                
|_Elisabeth of WELF __|
  (1272 - 1294)       |
                      |                           _____________________________________
                      |                          |                                     
                      |_Liutgard of SCHAUENBURG _|
                        (.... - 1288)            |
                                                 |_____________________________________