Surname Chapelain (Chaplin 
, Chaplain 
, Chapelain 
) , around the globe, is a common cognomen. The surname Chapelain is habitual in Belize, where it is quite a common surname, the United Kingdom, where it is quite a rare surname, and Australia. Measured by absolute frequency, it is the most numerous in the United States, the United Kingdom, and France. Much less frequently, Chapelain is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Chaplin | Australia, France, Indonesia, United States, United Kingdom |
| Chaplain | Australia, France, Canada, United States, United Kingdom |
| Chapelain | Australia, Canada, Brazil, United States, United Kingdom |
| Шаплен | Kazakhstan |
| andré le chapelain 12th-century author, FR (b. 1150) |
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jean chapelain French poet and critic, FR (b. 1595) |
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| charles-jean-baptiste le chapelain FR (b. 1710) |
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| vincent chapelain French politician (1757-1818), FR (b. 1757) |
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| gervais martin chapelain FR (b. 1785) |
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| désiré dit clodomir de chapelain French official and politician, FR (b. 1802) |
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| roger chapelain-midy French painter (1904-1992), FR (b. 1904) |
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| lucien chapelain French political activist (1920-2008), FR (b. 1920) |
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| alain chapelain French politician, FR (b. 1944) |
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| antoine chapelain particle physicist at CEA Saclay in France |
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| alexis le chapelain Ph.D. Institut d'études politiques de Paris 2014 |
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| dorothee chapelain FR (b. 1979) |
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| chapelain de monval |
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| jacques chapelain |
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