George Buchanan
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- 1 George Buchanan [1]
- Elizabeth Leckie
- 2 Iain Buchanan [1.1] b. 1618 d. Abt 1662
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- 3 George Buchanan [1.1.1] b. 1648 d. 1675
- Elizabeth Mayne
- 4 Thomas Buchanan [1.1.1.1] b. Abt 1680 d. 1748
- Jean
- 5 William Alexander Buchanan [1.1.1.1.1] b. 12 Oct 1698 d. 30 Aug 1730
- Mary Elizabeth
- 6 John Buchanan [1.1.1.1.1.1] b. 1727 d. 1763
- Jane Trindle Russell
- 7 James Buchanan [1.1.1.1.1.1.1] b. 1761 d. 1821
- Elizabeth Speer
- 8 15 President of the United States James Buchanan [1.1.1.1.1.1.1.1] b. 23 Apr 1791 d. 1 Jun 1868
- 8 15 President of the United States James Buchanan [1.1.1.1.1.1.1.1]
- 7 James Buchanan [1.1.1.1.1.1.1]
- 6 John Buchanan [1.1.1.1.1.1]
- 5 William Alexander Buchanan [1.1.1.1.1]
- 4 Thomas Buchanan [1.1.1.1]
- 3 George Buchanan [1.1.1]
- 2 Iain Buchanan [1.1]