Sir Alexander de Seton, Knight

Sir Alexander de Seton tertius.
It has been shown that this Alexander is styled son of Sir Seher de Seton in a charter by Roger de Quincy to the Abbey of Lindores, dated about 1248/9. Presumably he was then of age, and may have been born about 1227. In later Charters of 1260 and 1262 he and his father appear as witnesses. It is not however possible to state when his father died and he succeeded, as no charter of confirmation of his estates has been traced. The first historical reference to him appears in the Chronicle of Melrose which states that "a certain Knight of Scottish origin, named Alexander de Seton" accompanied Prince Edward (afterwards Edward I) son of Henry III of England to the Holy Land in 1270, and was present with him at Acre. The chronicler adds that Sir Alexander's Esquire, Nicholas by name, was captured by the enemy and never heard of again.
He must have returned home soon afterwards, as, in or about 1271, he presented the estate of Ruchelaw to the Abbey of Melrose for the souls of himself, his wife, and his heirs. This estate was originally granted by Patrick de Dunbar, Earl of March to Bertram or Bartine Seton, and the confirmation charter by William the Lion was probably dated 1201. It presumably passed into the main line of the family after the death of Bertram, or his son Adam; and thence it came to Sir Alexander tertius who had a charter of confirmation of it from the Earl of Dunbar, which Is undated. About 1273 Sir Alexander was witness to a charter by "Elen le Zuche" (Alan le Zouche) to John of Kyndelouch.
The name of Sir Alexander's wife is unknown.
Lord Hailes considers she may have been Isobel, daughter of Duncan, ninth Earl of Fife. That is unlikely
as she married John Comyn, second Earl of Buchan.
Source: "The House of Seton" Vol 1, page 71.

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Alexander de Seton, knight, son of Sir Seyer de Seton, may perhaps have been the representative of Bertram de Seton; for about the year 1271 he granted, for the good of the souls of himself, his wife, and his heirs, a charter in favour of the Abbey of Melrose, of the lands mentioned above as granted to Bertram by the Earl of March, defined as all the land the grantor had in the territory of Ruchelau; the boundaries are set forth in the charter.
Source: "The Scots Peerage" Vol 8, page 563.

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Lord Hailes, Annals:
He considers the Sir Alexander who defended Berwick in 1333 was son of Sir Christopher, the Bruce's
brother-in-law, and that the Alexander Seton who was killed at Kinghorn in 1332 was an unidentified member of the family.
None of these explanations meets the case completely.
After prolonged consideration of the views expressed above, the following Table is submitted to show the possible relationship of this group:
1. Sir Seher de Seytoun, ob circa 1276.
2. Sir Alexander de Seton "tertius", his son - ob before 1296.
3a. Sir Alexander Seton "quartus" (son of "tertius") "le pere", Governor of Berwick - ob circa 1349.
3b. Christell "primus" (son of "tertius") - killed Dillecarew 1298.
4. Alexander V "le fils" (son of "quartus") - killed at Kinghorn, 1332.
Thomas (other son of "quartus") - hanged at Berwick 1333.
William (other son of "quartus") - drowned at Berwick 1333
John (other son of "quartus") - died before 1346.
Source: "The House of Seton" Vol 1, page 74.

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