Family name Братко (Братко 
) , throughout the world, is quite a rare surname. The surname Братко is habitual in Eastern Europe, particularly Ukraine, where it is quite a rare surname, Belarus, where it is a rare surname, and Russia. Measured by absolute frequency, it is commonest in Ukraine, Russia, and Kazakhstan. Very seldom, Братко is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Братко | Russia, Kazakhstan, Bulgaria, Ukraine, Belarus |
| братко богдан мартинович Ukrainian actor, UA (b. 1941) |
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| братко іван Ukrainian sculptor, painter, artist, UA (b. 1968) |
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| братко олег анатолійович Ukrainian military personnel, UA (b. 1980) |
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| братко, екатерина васильевна Russian footballer, RU (b. 1993) |
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