Marmaduke de Thweng
Marmaduke was born about 1170 in Thweng,Bridlington,East Riding,Yorkshire, England.  He died in 1235 in Yorkshire,England.

 Emma Darrel
Emma was born about 1166.  Emma is no longer alive.

 Robert de Thweng
Robert was born about 1208 in Kilton Castle,Kilton,North Riding,Yorkshire, England.  He died after June 17th, 1247 in Kilton Castle,Cleveland,Yorkshire,England.

 Cecilia Thweng
Cecilia was born in 1215 in Flamborough,Yorkshire,England.  She died at the age of 50 in 1265.