_Christopher I Valdemarsen ESTRIDSEN _+
                                                   | (1219 - 1259)                        
                             _Eric V ESTRIDSEN ____|
                            | (1249 - 1286)        |
                            |                      |_Margaret of SOBIESLAW _______________
                            |                        (1230 - 1282)                        
 _Christopher II ESTRIDSEN _|
| (1276 - 1332)             |
|                           |                       _John I ASCANIA ______________________+
|                           |                      | (1213 - 1266) m 1255                 
|                           |_Agnes of ASCANIA ____|
|                             (1257 - 1304)        |
|                                                  |_Jutta of ASCANIA ____________________+
|                                                     m 1255                              
|
|--Eric Christoffersen ESTRIDSEN 
|  (1307 - 1331)
|                                                   _Barnim I GRIFFIN ____________________+
|                                                  | (1217 - 1278)                        
|                            _Bogislaw IV GRIFFIN _|
|                           | (1255 - 1308)        |
|                           |                      |_Margareta of MECKLENBURG ____________+
|                           |                        (1231 - 1261)                        
|_Euphemia of GRIFFIN ______|
  (1285 - 1330)             |
                            |                       ______________________________________
                            |                      |                                      
                            |_Margareta of RUGIA __|
                                                   |
                                                   |______________________________________