_John I of DREUX ____________+
                                                 | (1217 - 1286)               
                       _John II of DREUX ________|
                      | (1238 - 1305)            |
                      |                          |_Blanche of BLOIS-CHAMPAGNE _+
                      |                            (1226 - 1283)               
 _Arthur II of DREUX _|
| (1262 - 1312) m 1292|
|                     |                           _Henry III PLANTAGENET ______+
|                     |                          | (1207 - 1272) m 1236        
|                     |_Beatrice of PLANTAGENET _|
|                       (1242 - 1274)            |
|                                                |_Eleanor of BARCELONA _______+
|                                                  (1223 - 1291) m 1236        
|
|--Alix of DREUX 
|  (1298 - 1377)
|                                                 _John I DREUX _______________+
|                                                | (1215 - 1249) m 1240        
|                      _Robert IV DREUX _________|
|                     | (1241 - 1281)            |
|                     |                          |_Marie of BOURBON-DAMPIERRE _+
|                     |                            (1220 - 1274) m 1240        
|_Yolande of DREUX ___|
  (1263 - 1330) m 1292|
                      |                           _John I of MONTFORT _________+
                      |                          | (.... - 1249) m 1247        
                      |_Beatrice of MONTFORT ____|
                        (1248 - 1311)            |
                                                 |_Jeanne of CHÂTEAUDUN ______+
                                                   (1227 - 1252) m 1247