Surname Gladkikh (Гладких 
, Gladkikh 
) , in all the world, is a common cognomen. The family name Gladkikh is characteristic of Russia, where it is quite a common surname, Kazakhstan, where it is quite a rare surname, and Ukraine.
| VARIANT | COUNTRY |
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| Гладких | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Gladkikh | Russia, Czechia, Rwanda, United States, Israel |
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yakov gladkikh (b. 1899) |
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| p. gladkikh researcher ORCID ID = 0000-0003-0450-3951 |
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| aleena a gladkikh researcher |
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| vladislav gladkikh researcher, ORCID id # 0000-0002-4603-5706 |
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| polina d gladkikh researcher |
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| daniil gladkikh researcher ORCID ID = 0000-0003-3736-0803 |
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| anna gladkikh researcher |
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| tatiana m gladkikh researcher |
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Mr, Alona, Anton, Artem, Boris, Pavel, Roman, Denis, Daria, Darya, Alina, Lubov, Elena, Irina, Iouri, Yulia, Marina, Mariya, Mariia, Maksim, Sergey, Julia, Sofia, Sasha, Maxim, Ms, Mark, Alex, Alla, Anna, Anya, Petr, Dima, Lina, Judy, Egor, Inna, Ilia, Ilya, Ivan, Igor, Olga, Oleg, Yana, Yury, Maria, Sergei, and Alexei