_Sancho IV IVREA ________+
                                                        | (1258 - 1295)           
                        _Ferdinand IV IVREA ____________|
                       | (1285 - 1312)                  |
                       |                                |_Maria of IVREA _________+
                       |                                  (1265 - 1321)           
 _Alfonso XI BURGUNDY _|
| (1311 - 1350)        |
|                      |                                 _Denis BURGUNDY _________+
|                      |                                | (1261 - 1324)           
|                      |_Constanza Dinisez of BURGUNDY _|
|                        (1289 - 1313)                  |
|                                                       |_Elizabeth of BARCELONA _+
|                                                         (1271 - 1336)           
|
|--Fadrique Alfonso ENRÍQUEZ 
|  (1333 - 1358)
|                                                        _________________________
|                                                       |                         
|                       ________________________________|
|                      |                                |
|                      |                                |_________________________
|                      |                                                          
|_Eleanor of GUZMAN ___|
  (1310 - 1351)        |
                       |                                 _________________________
                       |                                |                         
                       |________________________________|
                                                        |
                                                        |_________________________