William I (Sir) DE ROS 
William I (Sir) was born about 1192 in Helmsley, North Riding, Yorkshire, England. He was an only child. He died about 1264 in Kirkham, Lancashire, England.General Notes
Source: (1) Weis & Sheppard, Ancestral Roots 7, (1992)., (2) Weis,Sheppard, Beal, The Magna Charta Sureties, 1215, 5th Ed., GenealogicalPublishing Co., Baltimore, [1999], 116-2, p. 152.
Probably died in the King's service at Poitou, 1264, accompanied the Kingto France, 1230, served in Scotland and Wales, 1257-1258.
‌William I (Sir) and Lucia were married in a religious ceremony in 1227 in Helmsley, North Riding, Yorkshire, England. They had two sons named Robert III and William (Sir).
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Children
Robert III DE ROS , Lord of Helmsley
Robert III was born about 1223 in Helmsley, North Riding, Yorkshire, England. He died on May 17th, 1285 in Helmsley, North Riding, Yorkshire, England.
William (Sir) de Ros
William (Sir) was born in 1244 in Helmsley, North Riding, Yorkshire, England. He died before May 28th, 1310 in Ingmanthorpe, Yorkshire, England.
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