Surname Петросян (Петросян 
, Petrosyan 
, Petrosian 
) , all around the world, is a common cognomen. The family name Петросян is habitual in Armenia, where it is a common surname, Georgia, where it is quite a common surname, and Russia. Not in comparison with a country's population, it is the most numerous in Russia, Armenia, and Ukraine. Also, Петросян is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Петросян | Russia, Belarus, Kazakhstan, Ukraine, Armenia |
| Petrosyan | Russia, Georgia, Armenia, United States, Uzbekistan |
| Petrosian | France, Russia, Georgia, Armenia, United States |
| Petrosjan | Netherlands, Germany, Slovakia, Estonia, United States |
Bedrosian, Bedrossian, Petrossian, Petrossyan, Pyetrosyan, and Tigran
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петросян, вартан аветович RU (b. 1895) |
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петросян, леон аганесович Game theorist, RU (b. 1940) |
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евгений ваганович петросян Russian comedian, RU (b. 1945) |
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тигран петросян RU (b. 1975) |
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| леонид григорьевич петросян AZ (b. 1930) |
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| петросян, юрий ашотович RU (b. 1930) |
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аделия тиграновна петросян Russian figure skater, RU |
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| петросян, армен альбертович Armenian actor, director, screenwriter, RU (b. 1963) |
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| петросян, александр сергеевич RU (b. 1965) |
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| петросян, сергей арсенович Russian weightlifter (1988-2017), RU (b. 1988) |
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| петросян, александр сергеевич UA |
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| петросян, армен карленович RU (b. 1991) |
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| петросян, артур мушегович RU (b. 1996) |
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