_Albert I ASCANIA ____________________+
                                                            | (1175 - 1260) m 1247                 
                        _John I ASCANIA ____________________|
                       | (1249 - 1285)                      |
                       |                                    |_Helen of WELF _______________________+
                       |                                      (1231 - 1273) m 1247                 
 _Albert III ASCANIA __|
| (1281 - 1308) m 1302 |
|                      |                                     _Birger Magnusson BJÄLBO ____________+
|                      |                                    | (1200 - 1266)                        
|                      |_Ingeborg Birgersdotter of BJÄLBO _|
|                        (1253 - 1302)                      |
|                                                           |_Ingeborg Eriksdotter of ERIC ________+
|                                                             (1212 - 1254)                        
|
|--Eric ASCANIA 
|  (.... - 1338)
|                                                            _Otto III ASCANIA ____________________+
|                                                           | (1215 - 1267)                        
|                       _Albert III ASCANIA ________________|
|                      | (1250 - 1300)                      |
|                      |                                    |_Beatrice of PŘEMYSLID ______________+
|                      |                                      (1225 - 1290)                        
|_Margaret of ASCANIA _|
  (1270 - 1315) m 1302 |
                       |                                     _Christopher I Valdemarsen ESTRIDSEN _+
                       |                                    | (1219 - 1259)                        
                       |_Matilda of ESTRIDSEN ______________|
                         (1250 - 1299)                      |
                                                            |_Margaret of SOBIESLAW _______________
                                                              (1230 - 1282)