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Male William III DE ROS , 2nd Lord Ross Click to view William III DE ROS , 2nd Lord Ross in the family tree

William III was born before 1287 in Helmsley, North Riding, Yorkshire, England.  William III's father was William II DE ROS , 1st Lord Ros of Helmsley and his mother was Maud (Matilda) DE VAUX.  His paternal grandparents were Robert III DE ROS , Lord of Helmsley and Isabel D' AUBIGNY; his maternal grandparents were John DE VAUX , Sheriff of Norfolk and Devorguilla MACDONAL , of Galloway. He had three sisters named Agnes, Margaret and Alice.  He was the second oldest of the four children.  He died on August 1st, 1359 in Helmsley, North Riding, Yorkshire, England.


William III's family with Margery DE BADLESMERE

‌William III and Margery were married in a religious ceremony before November 25th, 1316 in Helmsley, North Riding, Yorkshire, England.

Sources/Citations
Ancestral Roots 7, Plantagenet Ancestry of 17th Century Colonists

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