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Cognomen Janiszek (Janiszek
) , in the world, is a rare family name. The cognomen Janiszek is characteristic of Poland, where it is quite a rare surname, New Zealand, where it is a very rare surname, and Germany. Measured by absolute frequency, it is commonest in Poland, Germany, and France. More frequently, Janiszek is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Janiszek | Poland, France, New Zealand, United Kingdom, Germany |