Cognomen Caffyn (Caffyn 
) , around the world, is a rare family name. The family name Caffyn is habitual in the United Kingdom, where it is a rare surname, Australia, and New Zealand. Measured by absolute frequency, it is the most numerous in the United Kingdom, the United States, and Australia.
| VARIANT | COUNTRY |
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| Caffyn | Canada, United Kingdom, Australia, United States, New Zealand |
| matthew caffyn General Baptist preacher and writer (1628-1714) (b. 1628) |
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william caffyn cricketer (1828-1919) (b. 1828) |
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| william caffyn 19th century publisher (b. 1807) |
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| stephen mannington caffyn (1850-1896) surgeon and novelist (b. 1850) |
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| kathleen mannington caffyn Australian writer; author of "A Yellow Aster", IE (b. 1855) |
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| walter wallor caffyn (b. 1845) |
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| ben caffyn American baseball player, US (b. 1879) |
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nancy caffyn American politician (1934-2010), US (b. 1934) |
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paul caffyn New Zealand sea kayaker, NZ (b. 1946) |
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| edward roy caffyn GB (b. 1904) |
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| lucy caffyn archaeologist |
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