Family name Леонович (Leonovich 
, Леонович 
, Leonovič 
) , in all the world, is quite a common last name. The family name Леонович is habitual in Eastern Europe, particularly Belarus, where it is quite a common surname, Russia, where it is quite a rare surname, and Ukraine. Much less frequently, Леонович is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Leonovich | Austria, Belarus, United States, Democratic Republic of the Congo, Russia |
| Леонович | Kazakhstan, Ukraine, Belarus, Russia, Armenia |
| Leonovič | Lithuania |
| Leonovych | United States, Ukraine |
Leonovitch, and Leonowicz
| леонович, иван семёнович Soviet military personnel (1920-1946), BY (b. 1920) |
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| леонович павел антонович BY (b. 1910) |
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| леонович, борис николаевич UA (b. 1912) |
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| леонович, владимир николаевич Russian poet, RU (b. 1933) |
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| леонович иван иосифович BY (b. 1929) |
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| евстафий евстафьевич леонович BY (b. 1936) |
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| станислав викторович леонович pair skater, RU (b. 1958) |
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| леонович роман дмитрович Ukrainian military personnel, UA |
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| леонович, кирилл васильевич Belarusian association football player, BY (b. 1998) |
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Зоя, Інна, Ігор, Юлия, Юлія, Юрий, Юрій, Мария, Марта, Марія, Марфа, Алина, Алена, Алеся, Аліна, Антон, Арина, Артем, Артур, Артём, Борис, Ганна, Іван, Павло, Яков, Яніс, Яна, Майя, Алег, Алла, Анна, Петр, Нина, Ніна, Ніла, Вера, Віта, Віра, Леся, Ліна, Олег, Илья, Иван, Егор, Рада, Роза, Фрол, Яків, and Павел