Family name Montassier (Montassier 
) , across the world, is a rare cognomen. The last name Montassier is habitual in France, where it is a rare surname, Brazil, where it is a very rare surname, and Venezuela. Much less frequently, Montassier is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Montassier | Brazil, Argentina, China, Venezuela, France |
| louis montassier libyan sports executive, FR (b. 1850) |
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| henri montassier French painter (1880-1946), FR (b. 1880) |
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| gérard montassier French essayist and official, FR (b. 1937) |
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| wilfrid montassier French politician, FR (b. 1960) |
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| helio josé montassier researcher |
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| emmanuel montassier researcher |
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| mickaël montassier Ph.D. Université Bordeaux 1 2005 |
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Mr, Alban, Anita, Cathy, Cindy, Cyril, Bruna, Bryan, Katia, Paulo, Roger, David, Laura, Louis, Lucia, Lucie, Lucas, Luiza, Jorge, Joris, Joël, Julie, Alain, Suely, Sarah, Meiry, Ms, Max, Ana, Guy, Gã, Jã, Alex, Anne, Paul, Rene, Nolan, Gael, Jose, Joel, Jean, Hugo, Isis, Olga, Yann, Maria, Marie, Marco, Leda, and Elzio