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Male William (Sir) I de ROS Click to view William (Sir) I de ROS in the family tree

William (Sir) I de was born after 1196 in Helmsley Castle, North Ride, Yorkshire, England.  William (Sir) I de's father was Robert (Sir) II de ROS and his mother was Isabel, Princess of SCOTLAND.  His paternal grandparents were Everard de ROS and Roese de TRUSSEBUT.  He was an only child.  He died in 1264 in Poitou, France.


William (Sir) I de's family with Lucia\Lucy FITZ PIERS

They had a son named Robert IV de.