His descendants held it until George Seton, 5th Earl of Winton, was convicted of high treason in 1716, resulting in the forfeiture of his titles.
Lord Winton was also condemned to death, but he managed to escape the Tower of London and fled to Rome, where he later died.
Noted accordingly in the records of the Scottish parliament, held at Scone 26 March 1371, at the coronation of Robert II, William de Seton is named among the "Nobiles Barones", as 'Dominus de Seton'.
Anderson states George Seton accompanied Chancellor Crichton to France & Burgundy in 1448 and 'was soon afterwards created a peer of parliament'," which referred to the young Seton having finally come of age and being given his family's seat held by his grandfather, and not of the creation.
[2]The Complete Peerage cites a jury on which "Sir George de Seton of that Ilk" served on 22 March 1451 (1450/1) and states that "he was created, shortly after that date, a Lord of Parliament as Lord Seton [S]".