4535. Robert de Thweng. Born ca 1250 in Kilton Castle, North Riding, Yorkshire. Robert died in 1283 in Kilton Castle, North Riding, Yorkshire.
In Dec 1265 Robert married Alice de Merlay (4191) , daughter of Sir Roger de Merlay (3841) (ca 1210-Dec 1265) & Isabel de Ros (3824) (ca 1227-aft 7 May 1275), in Morpeth, Northumberland. Born ca 1257 in Morpeth, Northumberland. Alice died in Feb 1268 in Kilton Castle, North Riding, Yorkshire.