Sir Alexander Don, 6th baronet (baptised 5 May 1780 – 11 April 1826), of Newton Don, Kelso, Scottish Borders, was a Scottish landowner, an officer in the British Army and a Member of Parliament (M.P.) for Roxburghshire from 1814 until 1826.
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Early life
Alexander was baptised on 5 May 1780. He was the oldest son of Sir Alexander Don, 5th Baronet, and Lady Harriet Cunningham, daughter of William Cunningham, 13th Earl of Glencairn.
Career
Alexander was a captain in the Roxburgh militia in 1802 and from 1803 to 1810, he lived the high life in Verdun in France.
He served in the Berwick Yeoman Cavalry from 1810 until 1813. He served as captain in the Roxburgh Yeomanry from 1814 and was promoted to major in 1821.
On Kirkwood's map of Edinburgh dated 1817 he is marked as owner of West Coates House and a large area south of it (now an area north of Haymarket Station). In 1820 he employed Robert Smirke to rebuild his mansion at Newton Don.



