William de ROS 
William de was born about 1196 in Helmsley Castle, North Rdiing, Yorkshire, England. William de's father was Robert de ROS and his mother was Isabella, Princess of SCOTLAND. He was an only child. He died in 1264 in Poitou, France.
They had a son named William de.
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Children
William de ROS
William de was born about 1240 in Ingmanthorpe, Kirk deighton, Yorkshire, England. He died on May 28th, 1310 in Grey Friars, York, Yorkshire, England.