The lands of Sorn belonged originally to the Keiths of Galston befpre passing
to the Hamilton family, confirmed by a Charter under the Great Seal on the 11th
December, 1406. Sir William Hamilton of Sorn and Sanquhar, a son of this marriage, was one of the
Senators of the College of Justice and Lord Treasurer to King James V, as well
as Captain of Edinburgh Castle. His daughter Isobel Hamilton, was his heiress who married George,
7th Lord Seton, and became mother to
Robert, 1st Earl of Winton; to Alexander, 1st Earl of Dunfermline; to Sir John
of Barnes; to Sir William of Kyllismuir; and to
Margaret, the wife of Claud Hamilton, Lord Paisley, ancestor to the Earl of
James V visited Sorn Castle on the occasion of the marriage of Isobel
Hamilton, the daughter of his Lord Treasurer with George Seton, son of the 6th
Lord Seton one of his Lords of Justice. The chair which His Majesty is said to have used on the
occasion was kept in Sorn Castle till the sale of the estate in 1782, when it
was transferred to Loudoun Castle, where it still remains.
The marriage of the first Isobel was a very important one which, "the union was devised to bring about an alliance betwixt the Setounes and
the Governor Arran," to whose house Sir William belonged, and was of such
political importance that a medal commemorating it was struck, bearing the
initials of the bride and bridegroom, I. H. and G. S., and the motto, "ung loy,
ung foy, ung roy," is of great historical interest, as an example of ancient phonetic spelling of French!
The lands and castle of Sorn passed to the 7th Lord Seton and then to his
son, Robert Seton, 8th Lord Seton and 1st Earl of Winton, and were sold by the succeeding
Robert, 2nd Earl of
Winton to the family of Loudoun, before eventually passing to the Somervells.