Sir William de Ros I of Hamlake
Sir William was born in Helmsley, Yorkshire, England.  He died about 1264 in Kirkham, England.

 Lucia FitzPiers of Brecknock
Lucia was born about 1196 in Helmsley, Yorkshire, England.  She died after 1266.

 Sir Robert de Ros IV Baron Ros of Belvoir
Sir Robert de Ros IV was born about 1223 in Belvoir.  He died on May 17th, 1285 in Kirkham, England.

 Sir William de Ros II
Sir William was born about 1244 in Ingmanthorpe, Yorkshire, England.  He died about May 28th, 1310 in Grey Friars, Yorkshire, England.

 Alice de Ros