_John III HARCOURT __+
                                                     | (1265 - 1329) m 1302
                              _John IV HARCOURT _____|
                             | (1290 - 1346)         |
                             |                       |_Alix of REGINAR ____+
                             |                         (.... - 1315) m 1302
 _John V HARCOURT ___________|
| (1320 - 1356)              |
|                            |                        _____________________
|                            |                       |                     
|                            |_Isabeau of PARTHENAY _|
|                              (.... - 1357)         |
|                                                    |_____________________
|                                                                          
|
|--James I of HARCOURT 
|  (1350 - 1405)
|                                                     _____________________
|                                                    |                     
|                             _______________________|
|                            |                       |
|                            |                       |_____________________
|                            |                                             
|_Blanche of PONTHIEU-IVERA _|
  (1322 - 1387)              |
                             |                        _____________________
                             |                       |                     
                             |_______________________|
                                                     |
                                                     |_____________________