Last name Sinclaire (Sinclaire 
) , all around the world, is a rare cognomen. The family name Sinclaire is characteristic of Cameroon, where it is a rare surname, Canada, and the United Kingdom. In absolute terms, it is the most numerous in the United States, Canada, and the United Kingdom. Likewise, Sinclaire is the forename as well as the last name.
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| Sinclaire | Democratic Republic of the Congo, Cameroon, Canada, United Kingdom, United States |
| frederick sinclaire Unitarian minister, pacifist, social critic, university professor, essayist, NZ (b. 1881) |
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nikki sinclaire British politician (born 1968), GB (b. 1968) |
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sinclaire johnson American middle-distance runner (b. 1996) |
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| stephanie sinclaire American artist, US (b. 1954) |
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| bratt sinclaire Italian record producer, IT (b. 1967) |
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| denzal sinclaire CA (b. 1969) |
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| thomas sinclaire Peerage person ID=277541 |
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| sinclaire m o'grady researcher |
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| william sinclaire polo player, US |
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| chelsea sinclaire GB (b. 1979) |
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| kendra sinclaire American pornographic actress, US (b. 1990) |
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| aly sinclaire |
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| sinclaire hobson US (b. 1999) |
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