Family name Macfadyen (Macfadyen 
, マクファーデン) , in all the world, is quite a rare cognomen. The cognomen Macfadyen is characteristic of the United Kingdom, where it is a rare surname, Canada, and New Zealand. Not in comparison with a country's population, it is the most numerous in the United Kingdom, the United States, and Canada.
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| Macfadyen | United Kingdom, Australia, United States, Canada, New Zealand |
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james macfadyen Scottish botanist (1799-1850), GB (b. 1799) |
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| p. macfadyen British banker (1841-1906) (b. 1841) |
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| john macfadyen Scottish Gaelic writer from Mull, GB (b. 1850) |
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| allan macfadyen Scottish bacteriologist, GB (b. 1860) |
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| dugald macfadyen British clergyman and writer (b. 1867) |
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| eric macfadyen English colonial administrator, rubber planter, businessman and tropical agriculture developer (1879-1966), GB (b. 1879) |
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| alexander macfadyen (b. 1879) |
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| william archibald macfadyen geologist, petrologist (b. 1893) |
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| virginia macfadyen US actress and author (1900-1966), US (b. 1900) |
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| douglas macfadyen Royal Air Force air marshals (1902-1968), GB (b. 1902) |
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| willie macfadyen Scottish footballer and manager (1904-1971), GB (b. 1904) |
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angus macfadyen Scottish actor, GB (b. 1963) |
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david matthew macfadyen English actor, GB (b. 1974) |
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| amyan macfadyen (b. 1920) |
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| gavin macfadyen American investigative journalist and documentary filmmaker, US (b. 1940) |
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