Information about important persons throughout history in the Clan Buchanan.
- George Buchanan, Humanist, Scholar, Historian
- Dugald Buchanan, Eminent Gaelic Poet
- James Buchanan, 1st Baron Woolavington
- Dr Watson Buchanan, Physician
- Sir George William Buchanan, Diplomat
- George Buchanan, Social Reformer
- Dr James McGill Buchanan, Nobel Prize for Economic Sciences
- Franklin Buchanan, Naval Officer
- John Young Buchanan, Scientist, Geographer
- Donald William Buchanan, Arts, Canada
- Dr Andrew Buchanan of Chingford, Politician, New Zealand
- A. W. Patrick Buchanan, Lawyer, Canada
- Sir Andrew Buchanan of Dunburgh
- Patrick Buchanan, Political Commentator, USA
- Walter Buchanan, Merchant, Politician
- John Buchanan, Botanist
- Isaac Buchanan, Commerce, Canada