Ruppenthal Genealogy . . .

Marmanduke de Thweng, 1st baron de Thweng
abt 1250, Yorkshire, North Riding, Kilton England - April 23, 1323, Yorkshire, North Riding, Kilton England

Isabel de Ros
abt 1276, Yorkshire, Hamlake Castle England - 1318, Yorkshire, Cleveland, Kilton Castle England
Married: ?? - ??

Lucy de Thwenge
abt March 24, 1278, Yorkshire, Brotten England - abt January 8, 1346, Yorkshire, Guisborough Priory England

Thomas de Thweng, knight
abt 1316, Yorkshire, Igmanthrope England - May 28, 1374

Katharine de Thweng
abt 1318, Somersetshire England - abt 1374, England

William de Thweng, 2nd lord of Thweng
?? - ??

Robert de Thweng, 3rd lord of Thweng
?? - ??

Margaret de Thweng
?? - ??