_Peter I of DREUX ____________+
                                                         | (1187 - 1250) m 1213         
                            _John I of DREUX ____________|
                           | (1217 - 1286)               |
                           |                             |_Alix of THOUARS _____________
                           |                               (1200 - 1221) m 1213         
 _John II of DREUX ________|
| (1238 - 1305)            |
|                          |                              _Theobald IV BLOIS-CHAMPAGNE _+
|                          |                             | (1201 - 1253)                
|                          |_Blanche of BLOIS-CHAMPAGNE _|
|                            (1226 - 1283)               |
|                                                        |_Agnes of BEAUJEU ____________
|                                                          (.... - 1231)                
|
|--Blanche of DREUX 
|  (1271 - 1327)
|                                                         _John Lackland PLANTAGENET ___+
|                                                        | (1166 - 1216) m 1200         
|                           _Henry III PLANTAGENET ______|
|                          | (1207 - 1272) m 1236        |
|                          |                             |_Isabella TAILLEFER __________+
|                          |                               (1186 - 1246) m 1200         
|_Beatrice of PLANTAGENET _|
  (1242 - 1274)            |
                           |                              _Ramon Berenguer IV ARAGON ___+
                           |                             | (1198 - 1245)                
                           |_Eleanor of BARCELONA _______|
                             (1223 - 1291) m 1236        |
                                                         |_Beatrice of SAVOY ___________+
                                                           (1198 - 1267)