Last name Darnley (Darnley 
) , in the entire world, is a rare family name. The cognomen Darnley is habitual in New Zealand, where it is a rare surname, the United Kingdom, and Australia. Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Australia. Very seldom, Darnley is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Darnley | Canada, Nigeria, Australia, United States, United Kingdom |
| james darnley (1684-1685) (b. 1684) |
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| john stuart darnley British politician (b. 1827) |
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| edward darnley Australian politician (b. 1859) |
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| herbert darnley British music hall comedian, song writer, recording artist and theatrical producer, GB (b. 1872) |
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| olivia darnley actress |
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| matt darnley researcher (ORCID 0000-0003-0156-3377) |
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| charles darnley Peerage person ID=105056 |
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