Cognomen Багдонас (Багдонас 
) , in all the world, is a rare family name. The last name Багдонас is characteristic of Lithuania, where it is a rare surname, Belarus, where it is a very rare surname, and Kazakhstan. Measured by absolute frequency, this name is the most popular in Russia, Lithuania, and Kazakhstan. Very seldom, Багдонас is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Багдонас | Ukraine, Kazakhstan, Belarus, Lithuania, Russia |
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багдонас, гедиминас Lithuanian road racing cyclist, LT (b. 1985) |
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| багдонас, римантас казимирович Lithuanian amateur wrestler, LT (b. 1938) |
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| владас багдонас Lithuanian actor, LT (b. 1949) |
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| багдонас, эдминас Lithuanian politician, LT (b. 1963) |
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| багдонас, юозас Lithuanian rower, LT (b. 1968) |
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