Cognomen Cayley (凯利 
, Cayley 
, Кейли) , in the world, is quite a rare surname. The surname Cayley is habitual in Australia, where it is a rare surname, the United Kingdom, and New Zealand. Not in comparison with a country's population, it most frequently occurs in China, the United Kingdom, and Australia. More prevalently, Cayley is the forename as well as the last name.
| sir william cayley, 1st baronet (1610-1681) (b. 1610) |
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| sir william cayley, 2nd baronet (born 1635) (b. 1635) |
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| cornelius cayley (born 1644) (b. 1644) |
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cornelius cayley English Methodist preacher and writer (b. 1727) |
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| cornelius cayley (1692-1779) (b. 1692) |
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george cayley British aeronautics engineer (1773-1857), GB (b. 1773) |
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| william cayley (born 1724) (b. 1724) |
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| john cayley (1730-1795) (b. 1730) |
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| edward cayley (1733-1805) (b. 1733) |
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| william cayley naval officer, born 1742 (b. 1742) |
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edward stillingfleet cayley British politician (b. 1802) |
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| john cayley (1761-1831) (b. 1761) |
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| henry cayley (1768-1850) (b. 1768) |
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arthur cayley English mathematician (1821-1895), GB (b. 1821) |
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| arthur cayley English cleric and biographer (b. 1776) |
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