Family name Clair (Clair 
, كلير 
, クレア 
, among others...) , across the world, is a common last name. The surname Clair is characteristic of Marshall Islands, where it is a common surname, Saint Lucia, where it is quite a common surname, and Mauritius (explore the name in all countries). Not in comparison with a country's population, the name is most common in the United States, France, and Japan. Also, Clair is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Clair | Brazil, United Kingdom, France, United States, Australia |
| كلير | Iran, Iraq, Palestinian Territory, Egypt, Syria |
| クレア | Japan |
| קלייר | Israel |
| Клэр | Kyrgyzstan, Russia |
| william st. clair (born 1633) (b. 1633) |
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| robert st. clair (1641-1702) (b. 1641) |
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| george st. clair (born 1642) (b. 1642) |
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| thomas st. clair (born 1643) (b. 1643) |
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| matthew st. clair (born 1645) (b. 1645) |
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| matthew st. clair (born 1647) (b. 1647) |
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| a. de bois clair painter in lenticular relief, FR (b. 1654) |
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| elizabeth st. clair (born 1660) (b. 1660) |
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| henry st. clair, 1st/10th lord sinclair (born 1660) (b. 1660) |
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| john st. clair (born 1663) (b. 1663) |
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| christian st. clair (born 1668) (b. 1668) |
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| john st. clair (1679-1742) (b. 1679) |
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| john st clair, master of sinclair British politician (b. 1683) |
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| margaret st. clair (~1686-1756) Peerage person ID=129148 (b. 1686) |
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| james st clair Scottish soldier and Whig politician (b. 1688) |
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