Cognomen Haycock (Haycock 
, Хейкок 
) , all around the world, is quite a rare surname. The family name Haycock is habitual in Isle of Man, where it is quite a common surname, Bermuda, where it is quite a rare surname, and New Zealand. In absolute terms, it most frequently occurs in the United Kingdom, the United States, and Canada.
| VARIANT | COUNTRY |
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| Haycock | United Kingdom, Canada, Australia, New Zealand, United States |
| Хейкок | Ukraine |
| john hiram haycock English architect (b. 1759) |
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| edward haycock English architect (b. 1790) |
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| joseph longford haycock Canadian politician, CA (b. 1850) |
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| james haycock mayor of Richmond, New Zealand, NZ (b. 1852) |
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| alexander haycock British politician (1882-1970), GB (b. 1882) |
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| fred haycock footballer (1886-1955), GB (b. 1886) |
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| maurice hall haycock Canadian mineralogist, former Head, Mineralogy Section, Department of Energy, Mines and Resources, Ottawa, Ontario (b. 1900) |
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| obed crosby haycock American scientist (b. 1901) |
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pete haycock British musician, GB (b. 1951) |
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| freddie haycock association football player (1912-1989), GB (b. 1912) |
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| myfanwy haycock British writer, GB (b. 1913) |
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| d. arthur haycock Secretary to several twentieth-century presidents of The Church of Jesus Christ of Latter-day Saints, US (b. 1916) |
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| christine e. haycock American nurse and surgeon (b. 1924) |
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| george burdett haycock b.18 June 1940 d.19 July 2012 (b. 1940) |
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| frederick j haycock GB (b. 1948) |
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