_Robert DE ROS ______ | _William DE ROS _____| | | | |_Isabel OF SCOTLAND _+ | _William DE ROS _____| | (.... - 1310) m 1268| | | _____________________ | | | | |_Lucy FITZPIERS _____| | | | |_____________________ | | |--William DE ROS | | _____________________ | | | _____________________| | | | | | |_____________________ | | |_Eustache FITZRALPH _| m 1268 | | _____________________ | | |_____________________| | |_____________________