Marmaduke de Thwenge
Marmaduke was born in 1225 in Kilton Castle, Brotton, Yorkshire, England.  He died at the age of 54 in December 1279 in Kilton Castle, Brotton, Yorkshire, England.¹ 

 Lucia De Bruce
Lucia was born in 1236 in Skelton Castle, Yorkshire, England.² 

 Marmaduke de Thwenge
Marmaduke was born in September 1256 in Kilton Castle, Brotton, Yorkshire, England.³   He died at the age of 67 in 1323 in Thweng, Yorkshire, England.³ 

 Robert de Thwenge
Robert was born in 1258 in Kilton Castle, Brotton, Yorkshire, England.² 

 Sir John de Thwenge
Sir John was born in 1261 in Kilton Castle, Brotton, Yorkshire, England.  He died at the age of 69 on December 2nd, 1330.

 Sir Edmund de Thwenge
Sir Edmund was born in 1263 in Kilton Castle, Brotton, Yorkshire, England.  He died at the age of 81 on October 15th, 1344 in Cornburgh, Yorkshire, England.

 Margery de Thwenge
Margery was born in 1267 in Kilton Castle, Brotton, Yorkshire, England.

 Alice de Thwenge
Alice was born in 1296 in Kilton Castle, Sefton, Lancashire, England.²