Surname Carnac (Carnac 
) , in all the world, is a rare family name. The last name Carnac is habitual in France, where it is a rare surname, the United Kingdom, where it is a very rare surname, and India, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Carnac | France, Brazil, United Kingdom, India, United States |
| john carnac British East India Company general, IN (b. 1716) |
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| pierre carnac science historian and writer, FR (b. 1921) |
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| henrietta carnac (died 1897) |
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| helen carnac jewelry designer |
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| romain carnac |
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Mr, Chloé, Karine, Rachel, Romain, Régis, Danesh, Gilles, Lucile, Janine, Jeanne, Jeyhaan, Julien, Thomas, Elouan, Yasmin, Yvette, Martine, Shahvir, Armelle, Aurelie, Charles, Amanda, Alexia, Sophie, Sebast, Ms, Sir, Sã, Anne, Rene, Ruth, Nick, Elen, Emma, Hosi, Claudie, Yves, Sarah, Sopha, Alain, Chris, David, Louis, Erwan, Helen, Véro, Maudib, Marie, and Barbara