Cognomen Bellairs (Bellairs 
) , in the world, is a rare family name. The cognomen Bellairs is characteristic of Australia, where it is a rare surname, South Africa, and the United Kingdom. Not in comparison with a country's population, this name is the most popular in the United States, South Africa, and Australia.
| VARIANT | COUNTRY |
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| Bellairs | United Kingdom, South Africa, Australia, United States, New Zealand |
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william bellairs British army officer (1823-1913), GB (b. 1823) |
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edmund bellairs British military officer, artist and New Zealand politician (1823–1896), NZ (b. 1823) |
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| henry bellairs (b. 1791) |
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| lieut. walford thomas bellairs (b. 1794) |
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| mary ellen bellairs (1820-1890) (b. 1820) |
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| eugene bellairs New Zealand land surveyor and artist (1824–1911), FR (b. 1824) |
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| nona bellairs British author of travel guides, botanical guidebooks, and novels and botanical collector (b. 1824) |
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| charles bishop bellairs (b. 1818) |
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| marguerite louise bellairs (b. 1826) |
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| blanche st. john bellairs Wife of William Bellairs, GB (b. 1847) |
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john bellairs American novelist, primarily speculative fiction for children, US (b. 1938) |
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| george bellairs English novelist, GB (b. 1902) |
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| angus d'albini bellairs British herpetologist and anatomist, GB (b. 1918) |
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| mal bellairs American Radio Broadcaster, US (b. 1919) |
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| ruth bellairs (b. 1926) |
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