Surname Каплун (Kaplun 
, Каплун 
) , in all the world, is a common cognomen. The surname Каплун is characteristic of Ukraine, where it is quite a rare surname, Israel, and Russia. Very seldom, Каплун is the forename as well as the last name.
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| Kaplun | Argentina, Russia, United States, Israel, Poland |
| Каплун | Ukraine, Kazakhstan, Belarus, Russia, Kyrgyzstan |
| каплун, адриан владимирович Russian artist (1887-1974), RU (b. 1887) |
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| мануэль самойлавіч каплун BY (b. 1883) |
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| каплун, борис гитманович Soviet politician, UA (b. 1894) |
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| каплун, сергей ильич Soviet hygenist and occupation safety expert, UA (b. 1897) |
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| каплун, соломон гитманович RU (b. 1891) |
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| каплун, эммануил моисеевич UA (b. 1900) |
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| каплун віталій григорович UA (b. 1938) |
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| каплун, леонид израилевич Ukrainian chess player, UA (b. 1948) |
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| каплун, лев исаакович RU (b. 1946) |
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| каплун, виктор григорьевич Soviet footballer and referee, UA (b. 1958) |
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| борис каплун RU (b. 1951) |
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| каплун олександр петрович Ukrainian military personnel, UA (b. 1977) |
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| герман владимирович каплун RU (b. 1968) |
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| кацярына вячаславаўна каплун BY |
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Аня, Ніла, Вера, Влад, Віта, Віра, Зорь, Леся, Лиза, Ліна, Люба, Олег, Илья, Инна, Иван, Елла, Егор, Ефим, Саша, Яків, Яков, Циля, Ніна, Нина, Неля, Наум, Дан, Зоя, Лев, Ида, Яна, Іда, Іра, Юра, Єва, Катя, Ілля, Кира, Марк, Алла, Анна, Бела, Геня, Гліб, Паша, Петр, Дар'Я, Діна, Майя, and Іван