Surname Blat (Blat 
, Blate 
, Blatt ) , all over the world, is a common last name. The last name Blat is characteristic of Latvia, where it is quite a rare surname, Germany, and Switzerland. Not in comparison with a country's population, it is the most numerous in the United States, Germany, and Brazil. Much less frequently, Blat is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Blat | Germany, France, Brazil, Poland, United States |
| Blate | Canada, France, Spain, United States, Ethiopia |
| Blatt | Germany, France, Spain, Brazil, United States |
| Блат | Kazakhstan, Russia, Ukraine, Kyrgyzstan |
| agustí blat i blat (b. 1806) |
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| léon blat FR (b. 1851) |
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| alberto blat Italian Dominican friar, theologian and canonist (1870-1943) (b. 1870) |
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| lluís bosch-labrús i blat Spanish businessperson (1870-1942), ES (b. 1870) |
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| maria bosch-labrus y blat (1890-1980) (b. 1890) |
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ricardo blat Brazilian actor, BR (b. 1950) |
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| ismael blat monzó Spanish painter, ES (b. 1901) |
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| francisco blat beltrán (b. 1904) |
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| alfons blat monzó ES (b. 1904) |
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| josé blat gimeno Spanish teacher, ES (b. 1914) |
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caio blat Brazilian actor, BR (b. 1980) |
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| jan blat PL (b. 1930) |
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| julio césar martínez blat Spanish politician, ES (b. 1957) |
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| empar blat 1958- (b. 1958) |
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| josep blat researcher, ORCID id # 0000-0002-5308-475X |
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