_____________________
                                             |                     
                       _Robert III of ROS ___|
                      |                      |
                      |                      |_____________________
                      |                                            
 _William of ROS _____|
|                     |
|                     |                       _William I DUNKELD __+
|                     |                      | (1142 - 1214)       
|                     |_Isabella of DUNKELD _|
|                       (1165 - ....)        |
|                                            |_Isabel of AVENEL ___
|                                                                  
|
|--William of ROS 
|  (.... - 1310)
|                                             _____________________
|                                            |                     
|                      ______________________|
|                     |                      |
|                     |                      |_____________________
|                     |                                            
|_Lucy FITZPIERS _____|
                      |
                      |                       _____________________
                      |                      |                     
                      |______________________|
                                             |
                                             |_____________________