Sir William de Ros
Sir William was born about 1192 in Helmsley, York, England.  He died in 1265 in Kirkham, York, England.

 Lucia Fitz Piers
Lucia Fitz was born about 1205 in Brecknockshire, Wales.  She died after 1265.

 Lucy De Ros
Lucy was born about 1230.

 Sir Robert De Ros
Sir Robert was born about 1232 in Helmsley, York, England.

 Peter De Ros
Peter was born about 1235.

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

 Alice De Ros
Alice was born in 1248 in Ingmanthorpe, England.  She died in Stinton, Norfolk, England.