Sir William De Ros
Sir William was born about 1244 in Ingmanthorpe, England.  He died before 1310.

 Eustache Fitz Hugh
Eustache Fitz was born about 1244 in Greasley, Nottinghamshire, England.  She died before 1310.

 Lucy De Ros
Lucy was born about 1270 in Ingmanthorpe, England.  She died after 1332 in Plumpton, Yorkshire, England.

 Ivetta (Juetta) de Ros
Ivetta (Juetta) was born about 1290 in Ingmanthorpe, England.  She died before 1331.