_Philip of ARTOIS _______+
                                            | (1269 - 1298) m 1281    
                       _Robert III ARTOIS __|
                      | (1287 - 1342) m 1320|
                      |                     |_Blanche of DREUX _______+
                      |                       (1271 - 1327) m 1281    
 _John ARTOIS ________|
| (1321 - 1387)       |
|                     |                      _Charles VALOIS _________+
|                     |                     | (1269 - 1325) m 1302    
|                     |_Joan of VALOIS _____|
|                       (1304 - 1363) m 1320|
|                                           |_Catherine of COURTENAY _+
|                                             (1274 - 1307) m 1302    
|
|--Isabeau of ARTOIS 
|  (1361 - 1379)
|                                            _________________________
|                                           |                         
|                      _____________________|
|                     |                     |
|                     |                     |_________________________
|                     |                                               
|_Isabeau of MELUN ___|
  (1328 - 1389)       |
                      |                      _________________________
                      |                     |                         
                      |_____________________|
                                            |
                                            |_________________________