Robert de Thweng , Lord of Kilton, Sir Knight
Robert de was born in 1214 in Thwing, Bridlington, East Ride Yorkshire, England.  He died at the age of 33 in 1247 in Kilton Castle, Cleveland, Yorkshire, England.

 Maud Heiress of Kilton
Maud Heiress of was born about 1215 in Kilton Castle, Cleveland, Yorkshire, England.  Maud Heiress of is no longer alive.

 Marmaduke de Thweng , Lord of Kilton, MP, Sir
Marmaduke de was born about 1234 in Kilton Castle, Cleveland, Yorkshire, England.  He died after 1294 in Castleton Castle, Derbyshire, England.