Surname Mortain (Мортен 
, Mortain 
, مورتان) , all over the world, is a rare last name. The family name Mortain is characteristic of France, where it is a rare surname, Russia, where it is an extremely rare surname, and the United States. In absolute terms, it most frequently occurs in France, Russia, and India. Much less frequently, Mortain is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Мортен | Russia, Ukraine |
| Mortain | India, United Kingdom, France, United States |
| éremburge de mortain second wife of Count Roger I of Sicily and second Sicilian countess, IT (b. 1060) |
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| guillaume de mortain British Earl, FR (b. 1100) |
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| agnes de mortain Peerage person ID=158544 |
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| denise de mortain Peerage person ID=465466 |
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| emma of mortain countess of Toulouse |
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| alain mortain French Naval Architect / Yacht Designer |
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| gilles de mortain FR |
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Guy, Jerome, Nadine, Mickael, Antoine, Clement, Cécile, Bernard, Pauline, Prosper, Ludovic, Nicolas, Fabrice, Florian, Olivier, Clément, Blandine, Léopold, Nathalie, Virginie, Isabelle, François, Didier, Robert, Pierre, Claude, Anne, Lola, Jean, Eloi, Eric, Fred, Frã, Sonia, Aline, Ambre, Frédérique, David, Lydie, Julie, Jules, Fanny, Yoann, Sylvie, Albert, Arnold, Agathe, Corine, Loïc, and Marie-Louise