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

father:
*Marmaduke de Thweng
born 1225 Kilton Castle, England
died December 1279 Castleton, England

mother:
*Lucy Brus
born about 1240 Skelton, Yorkshire, England
died 1272 Castleton, England

siblings:
unknown

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

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

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com