Last name Леонтьев (Леонтьев 
, Leontiev 
, Leontyev 
, among others...) , globally, is a common cognomen. The cognomen Леонтьев is characteristic of Russia, where it is quite a common surname, Kazakhstan, where it is quite a rare surname, and Belarus.
| VARIANT | COUNTRY |
|---|---|
| Леонтьев | Belarus, Ukraine, Russia, Uzbekistan, Kazakhstan |
| Leontiev | Moldova, Slovakia, Russia, United States, Bulgaria |
| Leontyev | Estonia, Russia, Germany, United States, Cyprus |
| Leontev | Finland, Russia, Lithuania, Germany, United States |
| Leont'Ev | Belarus, Russia |
| Leontjev | United Kingdom, Finland, Estonia, Lithuania, Germany |
| Leontjew | Poland, Germany, Australia, Argentina |
| леонтьев, алексей леонтьевич RU (b. 1716) |
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леонтьев, иван сергеевич RU (b. 1782) |
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| леонтьев, николай васильевич RU (b. 1739) |
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| леонтьев, алексей иванович RU (b. 1748) |
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леонтьев константин николаевич Russian philosopher (1831-1891), RU (b. 1831) |
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павел михайлович леонтьев RU (b. 1822) |
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| леонтьев, михаил алексеевич UA (b. 1785) |
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леонтьев, николай степанович Russian explorer, UA (b. 1862) |
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леонтьев, пётр иванович Russian actor (1883-1951), RU (b. 1883) |
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михаил евгеньевич леонтьев RU (b. 1881) |
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| леонтьев, константин михайлович RU (b. 1849) |
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| леонтьев, иван леонтьевич RU (b. 1856) |
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| леонтьев, александр александрович RU (b. 1859) |
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леонтьев, алексей николаевич Soviet and Russian writer, screenwriter., RU (b. 1927) |
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леонтьев, александр иванович Soviet physicist, RU (b. 1927) |
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