Cognomen Lorthiois (Lorthiois 
) , around the globe, is a rare family name. The family name Lorthiois is habitual in France, where it is quite a rare surname, Belgium, where it is a rare surname, and Poland, where it is a very rare surname.
| VARIANT | COUNTRY |
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| Lorthiois | Germany, Poland, Brazil, Belgium, France |
| pierre lorthiois French politician, FR (b. 1873) |
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| bruno lorthiois entrepreneur, FR (b. 1970) |
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| bruno lorthiois French Catholic deacon and community activist, FR (b. 1972) |
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| audrey lorthiois researcher |
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| edwige lorthiois researcher |
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Mr, Aurã, Cathy, Cyril, Brice, Bruno, Kevin, René, Denis, Laura, Lucas, James, Josse, Julia, Julie, Elise, Edith, Herve, Irene, Marion, Margot, Maxime, Amaya, Alban, Alain, Alexy, Ms, Ana, Guy, Lou, Luc, Marc, Anne, Rene, Lara, Lila, Melody, Lisa, Jean, Tony, Noel, Edna, Eric, Yann, Yvan, Marie, Manon, Serge, Joel, and Michel