Family name Kwarciak (Kwarciak 
) , around the world, is a rare last name. The surname Kwarciak is habitual in Poland, where it is quite a rare surname, Greece, where it is a very rare surname, and Canada. In absolute terms, this name is the most popular in Poland, the United States, and Canada. More prevalently, Kwarciak is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kwarciak | United Kingdom, Canada, United States, Poland, Greece |
| piotr kwarciak Polish Righteous Among the Nations, PL (b. 1901) |
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| maria kwarciak Polish Righteous Among the Nations, PL (b. 1907) |
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| feliks kwarciak Polish Righteous Among the Nations, PL (b. 1929) |
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| alfred kwarciak Polish Righteous Among the Nations, PL (b. 1932) |
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