Surname Hernon (Hernon 
) , globally, is quite a rare family name. The surname Hernon is habitual in Ireland, where it is quite a rare surname, the United Kingdom, where it is a rare surname, and Australia. In absolute terms, it is commonest in the United States, Ireland, and the United Kingdom. Very seldom, Hernon is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Hernon | United Kingdom, Ireland, Canada, Australia, United States |
| tom hernon American baseball player, US (b. 1866) |
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marcus hernon Irish musician, IE (b. 1959) |
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| jimmy hernon Scottish footballer (1924-2009), GB (b. 1924) |
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| peter hernon American librarian and library science professor (b. 1944) |
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| peter hernon (b. 1947) |
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| laura madeleine hernon Peerage person ID=266139 |
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| tom hernon researcher |
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| patrick joseph hernon Peerage person ID=266140 |
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| orlaith hernon researcher (ORCID 0000-0002-8712-6583) |
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