William I De Ros Mp, Lord Of Helmsley, Sir/Roos
William I De was born about 1196 in Helmsley Castle, North Ride Yorkshire, England.  He died in 1264 in Poitou, France.

 Lucy Fitzpiers
Lucy was born about 1208 in Brecknock, Wales.  She died after 1266.

 Lucy De Ros
Lucy De was born about 1225 in Helmsley Castle, North Ride Yorkshire, England.

 Robert IV "1St Baron" De Ros Of Belvoir, Mp
Robert IV "1St Baron" De was born in 1233 in Helmsley Castle, North Ride Yorkshire, England.  He died at the age of 52 on May 17th, 1285 in Belvoir Castle, Leicestershire, England.

 Sir William II De Ros Roos
William II De was born about 1240 in Ingmanthorpe, Kirk Deighton, Yorkshire, England.  He died before May 28th, 1310.  He was buried in Church Of Grsy F, Yorkshire, England.