Family name Boulain (Boulain 
) , globally, is a rare cognomen. The family name Boulain is characteristic of France, where it is quite a rare surname, the United Kingdom, where it is a very rare surname, and the United States, where it is an extremely rare surname. In absolute terms, it is commonest in France, the United Kingdom, and India.
| VARIANT | COUNTRY |
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| Boulain | United Kingdom, United States, India, France, Brazil |
| lucien boulain French writer, FR (b. 1837) |
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alfred boulain French politician, FR (b. 1937) |
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| françoise boulain French television director, FR (b. 1953) |
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| thierry boulain researcher (ORCID 0000-0003-4664-3661) |
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| marie de boulain, dame de boubers |
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Mr, Marie, Manon, Sarah, Simon, Serge, Alice, Alain, Alban, Andre, Annie, Chloe, Cyril, Brice, Bruno, Katia, Roger, Regis, Rémi, Denis, David, Laura, Fred, Emma, Eric, Nora, Ms, Amy, Guy, Leo, Lou, Luc, Eva, Ugo, Marc, Mael, Lison, Maud, Anne, Aude, Paul, Paco, Rene, Remi, Gael, Lily, Jean, Theo, Anna, and Louis