Cognomen Wieliczko (Wieliczko 
) , all around the world, is quite a rare last name. The last name Wieliczko is characteristic of Poland, where it is quite a rare surname, New Zealand, where it is a very rare surname, and Canada. In absolute terms, this name is the most popular in Poland, the United States, and the United Kingdom. More frequently, Wieliczko is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Wieliczko | France, Brazil, United States, United Kingdom, Poland |
Velichko, Veličko, Velychko, Welitschko, Welytschko, and Величко
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henryk wieliczko Member of Armia Krajowa, post II WW resistance movement against the Soviet occupation (1922-1949), PL (b. 1922) |
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| mieczysław wieliczko Polish historian (1935-2009), PL (b. 1935) |
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marta wieliczko Polish rower, PL (b. 1994) |
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| alina wieliczko Polish veterinarian researching poultry diseases, PL (b. 1952) |
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| mieczysław wieliczko PL (b. 1949) |
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| marika wieliczko researcher |
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| monika wieliczko Polish nephrologist |
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| daniela wieliczko FI |
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| aleksander ignacy wieliczko |
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