_Abel Valdemarsen ESTRIDSEN ___+
                                                                      | (1218 - 1252)                 
                                  _Eric I Abelsen ESTRIDSEN __________|
                                 | (1241 - 1272)                      |
                                 |                                    |_Matilda of SCHAUENBURG _______
                                 |                                      (1220 - 1288)                 
 _Valdemar IV Eriksen ESTRIDSEN _|
| (1262 - 1312)                  |
|                                |                                     _______________________________
|                                |                                    |                               
|                                |_Margaret of VITSLAV _______________|
|                                  (1247 - 1272)                      |
|                                                                     |_______________________________
|                                                                                                     
|
|--Eric II ESTRIDSEN 
|  (1290 - 1325)
|                                                                      _Albert I ASCANIA _____________+
|                                                                     | (1175 - 1260) m 1247          
|                                 _John I ASCANIA ____________________|
|                                | (1249 - 1285)                      |
|                                |                                    |_Helen of WELF ________________+
|                                |                                      (1231 - 1273) m 1247          
|_Elisabeth of ASCANIA __________|
  (1274 - 1306)                  |
                                 |                                     _Birger Magnusson BJÄLBO _____+
                                 |                                    | (1200 - 1266)                 
                                 |_Ingeborg Birgersdotter of BJÄLBO _|
                                   (1253 - 1302)                      |
                                                                      |_Ingeborg Eriksdotter of ERIC _+
                                                                        (1212 - 1254)