Family name Tomkowiak (Tomkowiak 
) , all over the world, is quite a rare surname. The last name Tomkowiak is habitual in Poland, where it is quite a rare surname, Germany, where it is a rare surname, and Switzerland. Measured by absolute frequency, it is commonest in Poland, Germany, and the United States. Much less frequently, Tomkowiak is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Tomkowiak | Germany, Switzerland, United States, Poland, France |
| ingrid tomkowiak German author, DE (b. 1956) |
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| grzegorz tomkowiak PL (b. 1954) |
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| martine tomkowiak researcher |
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| agnieszka tomkowiak researcher |
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