Sir
William
"The Waster"
Sinclair Second Lord Sinclair
formerly Sinclair
Born about in Caithness, Scotland
Ancestors 
Son of William (Sinclair) Sinclair Third Earl of Orkney First Earl of Caithness
and Elizabeth (Douglas) Douglas Countess of Orkney and Caithness
Brother of
Margaret (Stewart) Seton [half], Catherine Sinclair, Elizabeth Sinclair [half], John Sinclair [half], Elizabeth Sinclair, Robert Sinclair [half], Marion Sinclair [half], Susan Sinclair, Arthur Sinclair [half], George Sinclair [half], Alexander Sinclair [half], Oliver (Sinclair) Sinclair VIIth of Roslin [half], Eleanor (Sinclair) Sinclair Countess of Atholl [half], William (Sinclair) Sinclair Second Earl of Caithness [half] and Margaret (Sinclair) Boswell [half]
Husband of
Christian Leslie
— married
about 29 Apr 1458 [location unknown]
Descendants 
Died
at about age 50
in Dunfermline, Fife, Scotland [uncertain]
[uncertain]Profile last modified
| Created 31 Mar 2011
This page has been accessed 7,334 times.
| Preceded by William Sinclair |
2nd Lord Sinclair 1480 - 1487 |
Succeeded by Henry Sinclair |
Biography
William (Sinclair) Sinclair Second Lord Sinclair is a member of Clan Sinclair.
William (Sinclair) Sinclair Second Lord Sinclair was born in Scotland.
William Sinclair, called 'The Waster,' son of William, Earl of Caithness, Lord St. Clair by his first wife Elizabeth Douglas,[1][2] born about 1437. He was the elder of two sons of the same name, both of whom lived to maturity.
He was set aside by his father from the succession. On 29 March 1482 a brieve was issued from the Chancery of King James III, to the Sheriff of Edinburgh commanding him to summon a trial by jury on the sanity of William Sinclair, son and heir of the deceased William, Earl of Caithness, Lord St. Clair. He was judged to be incompos mentis et fatuus, and that he was a waster of his lands and goods and had been for 16 years.
He married Cristina Leslie, the daughter of George, Earl of Rothes, dispensation for marriage dated 29 April 1458.[3][4][5] They had issue:
- Henry, Lord Sinclair[4][5]
- William of Warsetter[5]
- Magnus[6]
- Elizabeth, m. as his 2nd wife, John Glendonwyn[6]
Sources
- ↑ Paul, James Balfour. "The Scots Peerage : founded on Wood's ed. of Sir Robert Douglas's Peerage of Scotland; containing an historical and genealogical account of the nobility of that kingdom", Edinburgh: David Douglas,1905, Vol. II, Archive.org, p. 333
- ↑ Henderson, John. "Caithness Family History", Edinburgh: David Douglas, 1884 , Archive.org, p. 1
- ↑ Paul, James Balfour. "The Scots Peerage : founded on Wood's ed. of Sir Robert Douglas's Peerage of Scotland; containing an historical and genealogical account of the nobility of that kingdom", Edinburgh: David Douglas, 1910, Vol. VII, Archive.org, p. 276
- ↑ 4.0 4.1 Paul, James Balfour. "The Scots Peerage : founded on Wood's ed. of Sir Robert Douglas's Peerage of Scotland; containing an historical and genealogical account of the nobility of that kingdom", Edinburgh: David Douglas,1905, Vol. II, Archive.org, p. 334
- ↑ 5.0 5.1 5.2 Paul, James Balfour. "The Scots Peerage : founded on Wood's ed. of Sir Robert Douglas's Peerage of Scotland; containing an historical and genealogical account of the nobility of that kingdom", Edinburgh: David Douglas, 1910, Vol. VII, Archive.org, p. 570
- ↑ 6.0 6.1 Paul, James Balfour. "The Scots Peerage : founded on Wood's ed. of Sir Robert Douglas's Peerage of Scotland; containing an historical and genealogical account of the nobility of that kingdom", Edinburgh: David Douglas, 1910, Vol. VII, Archive.org, p. 571
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DNA Connections
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It may be possible to confirm family relationships. Paternal line Y-chromosome DNA test-takers:
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Rejected matches › William (Sinclair) Sinclair Fourth Lord Sinclair (aft.1473-abt.1570) › William Sinclair › William (Sinclair) Sinclair Second Earl of Caithness (abt.1459-1513) › William (Sinclair) Sinclair Third Earl of Orkney First Earl of Caithness (abt.1404-bef.1480)
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S > Sinclair | S > Sinclair Second Lord Sinclair > William (Sinclair) Sinclair Second Lord Sinclair
Categories: Lord Sinclair | Clan Sinclair
https://en.wikipedia.org/wiki/William_Sinclair,_2nd_Earl_of_Caithness
Proper sources: References Henderson, John W.S (1884). Caithness Family History. Edinburgh: David Douglas. pp. 2-5. Retrieved 1 December 2019. [1] *footnote pages 2-5. Burke's Landed Gentry of Scotland, Kirkpatrick entry Kirkpatrick of Closeburn, 1858
William Sinclair, 2nd Lord Sinclair was the son of William Sinclair, 1st Earl of Caithness and Lady Elizabeth Douglas.2 He married Christina Leslie, daughter of George Leslie, 1st Earl of Rothes and Christian Haliburton, circa 29 April 1458.1 He died circa 14 July 1487. He was the eldest son but deprived of succession to the Earldom of Caithness and the territorial Barony of Rosslyn, however he still succeeded to the Lordship of Sinclair, Ravenscraig Castle, lands in Dysart and remained heir of line of the Earls of Orkney and name of Sinclair.1 In 1459 he got a charter of the lands of Newburgh through his wife.1 He succeeded as the 2nd Lord Sinclair [S., 1449] before 1480.1 In 1482 he was ajudged incapable of managing his own affairs for 16 years past.1 Child of William Sinclair, 2nd Lord Sinclair and Christina Leslie Henry Sinclair, 3rd Lord Sinclair+2 d. 9 Sep 1513 Citations [S37] BP2003 volume 1, page 642. See link for full details for this source. Hereinafter cited as. [S37] [S37] BP2003. [S37]