*Isabel Ros
born about 1259 Ingmanthorpe, England
died 1309 Thweng, England

father:
*Robert de Ros
born before <1245> Hamlake Castle, Yorkshire, England
died 1285

mother:
*Isabel d'Aubigny (Albini)
born 1233 Belvoir, Leicestershire, England
died 1301
married 1243/44 Leicestershire, England

siblings:
*William of Helmsley 1st Lord de Ros born about 1255 died 1316
Mary de Ros born about 1249 Helmsley, Yorkshire, England
Joan de Ros of Helmsley died 13 October 1348

spouse:
*Marmaduke de Thweng
born September 1256 Kilton Castle, England
died April 1322 Kilton Castle, England

children:
*Lucia de Thweng born about 1279 Kilton, Thweng, Durham, England
Katherine Thweng?

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com