_Albert I ASCANIA _____________+
                                                             | (1175 - 1260) m 1247          
                         _John I ASCANIA ____________________|
                        | (1249 - 1285)                      |
                        |                                    |_Helen of WELF ________________+
                        |                                      (1231 - 1273) m 1247          
 _Eric I ASCANIA _______|
| (1280 - 1360)         |
|                       |                                     _Birger Magnusson BJÄLBO _____+
|                       |                                    | (1200 - 1266)                 
|                       |_Ingeborg Birgersdotter of BJÄLBO _|
|                         (1253 - 1302)                      |
|                                                            |_Ingeborg Eriksdotter of ERIC _+
|                                                              (1212 - 1254)                 
|
|--John I ASCANIA 
|  (.... - 1372)
|                                                             _Barnim I GRIFFIN _____________+
|                                                            | (1217 - 1278)                 
|                        _Bogislaw IV GRIFFIN _______________|
|                       | (1255 - 1308)                      |
|                       |                                    |_Margareta of MECKLENBURG _____+
|                       |                                      (1231 - 1261)                 
|_Elisabeth of GRIFFIN _|
  (1291 - 1349)         |
                        |                                     _______________________________
                        |                                    |                               
                        |_Margareta of RUGIA ________________|
                                                             |
                                                             |_______________________________