Cognomen Weselak (Weselak 
) , in the world, is a rare surname. The surname Weselak is characteristic of Poland, where it is a rare surname, Canada, and New Zealand. In absolute terms, it is the most numerous in Poland, Canada, and the United States. Likewise, Weselak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Weselak | Germany, United States, Poland, Argentina, Canada |
| anton weselak Canadian politician (1918-1989), CA (b. 1918) |
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| janusz weselak PL (b. 1957) |
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| justyna weselak PL (b. 1976) |
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