17. Thomas12 Buchanan (John11, Thomas10, William9, Thomas8, George7, John6, Thomas5, John4, Thomas3, Thomas2, Sir Walter1) was born 1732. Thomas died 1789 at 57 years of age.
He married three times. He married Margaret Buchanan. Margaret was the daughter of Moses Buchanan. He married Jean Gray. From the marriage between Thomas Buchcanan and Jean Gray, the Gray-Buchanans are descended.
He married Helen Graham 28/11/1774. Helen was born 1756. Helen was the daughter of William Graham and Helen Crawford. Helen died 1812 at 56 years of age. Helen signed a marriage settlement with an unknown person 25/11/1774. Given to Strathclyde Archive in 1983.
Of Ardoch, near Loch Lomond.
Thomas Buchanan and Margaret Buchanan had the following child:

John Buchanan MP
Thomas Buchanan and Helen Graham had the following children:

William Buchanan
19
ii.
William Buchanan was born 1777. William died 19/01/1864 at 86 years of age. He married
Elizabeth Ann Murray. Elizabeth was born 1803. Elizabeth died 1846 at 43 years of age. Art historian and dealer
20
iii.
Helen Buchanan was born 1779. Helen died 1816 at 37 years of age. She married
John Balfour in Glasgow, Scotland, 6/07/1810. John was born in Edinburgh 4/4/1776. John was the son of
John Balfour 3rd Laird of Pilrig and Jean Whytt. John died December 1859 at 83 years of age. His body was interred
1859 in Rosebank Cemetary, Edinburgh. He was christened in Edinburgh, 26/4/1776. He was listed as head of
household in the 1841 census in Pilrig Street, Edinburgh. He was listed as head of household in the 1851 census in Waterloo
Place, Edinburgh. (See John Balfour for the continuation of this line.)
Died in childbirth.
21
iv.
Marion Buchanan was born 1782. Marion died 1822 at 40 years of age.
+
22
v.
Robert Buchanan was born 1784.
23
vi.
Thomas Graham Buchanan was born 1787. Thomas died 1871 at 84 years of age.
24
vii.
Archibald Buchanan was born 1789. Archibald died 1822 at 33 years of age.
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