William Seton (died 1410), born William de Wyntoun, was a 14th–15th-century noble.
William was the eldest son of Alan de Wyntoun and Margaret Seton, heiress of Seton. William adopted the name and arms of Seton, succeeding to the estates of his mother and was created the Lord Seton in 1371. Seton purchased the wardship of Elizabeth Gordon, Heiress of Gordon from Walter de Haliburton of Dirleton on 7 March 1408 for a liferent of 50 merks from the barony of Tranent. [2] Originally Elizabeth had been betrothed to his eldest son John, however he declined, Elizabeth was then betrothed to William's younger son, Alexander who by this time had been released by the English, after being captured with Prince James of Scotland while traveling aboard Maryenknyght, while en route to France.
He married Janet, the daughter of David Fleming of Biggar & Cumbernauld, they are known to have had the following issue: [3]
Marquess of Aberdeen and Temair, in the County of Aberdeen, in the County of Meath and in the County of Argyll, is a title in the Peerage of the United Kingdom. It was created on 4 January 1916 for John Hamilton-Gordon, 7th Earl of Aberdeen.
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Alexander Seton Montgomerie, 9th Earl of Eglinton was a Scottish peer, lord of the Eglinton Estate.
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John Hay, 2nd Marquess of Tweeddale PC was a Scottish nobleman.
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Archibald Kennedy IV, Earl of Cassilis,, was styled Lord Kennedy until 1831, and Earl of Cassilis thereafter until his death.
Alexander Seton, 1st Earl of Huntly, who adopted the family name of Gordon from about 1457, was a powerful 15th-century Scottish magnate. He was knighted in 1439/1440 and was Lord of Badenoch, Gordon, Strathbogie and Cluny.
George Gordon, 2nd Earl of Huntly was a Scottish nobleman and Chancellor of Scotland from 1498 to 1501.
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Elizabeth Gordon, Heiress of Gordon, Scottish baroness and progenitress of the Gordon Earls and Marquesses of Huntly.
Alexander Seton, Lord Gordon was a Scottish baron, Lord of Parliament and progenitor of the Gordon Earls and Marquesses of Huntly.
Sir Alan de Wyntoun was a Scottish soldier and crusader. He was the progenitor of three Scottish clans, being the ancestor of the Earls of Winton, Chiefs of Clan Seton, of the Earls of Eglinton, Chiefs of Clan Montgomery, and of the Earls of Huntly, Chiefs of Clan Gordon, respectively.