Last name Piotrowicz (Piotrowicz 
) , all around the world, is quite a common surname. The family name Piotrowicz is characteristic of Poland, where it is quite a common surname, Ireland, where it is a rare surname, and the United Kingdom. In absolute terms, it is commonest in Poland, the United States, and Germany. Likewise, Piotrowicz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Piotrowicz | Germany, France, Poland, United Kingdom, United States |
| stanisław piotrowicz LV (b. 1780) |
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| stanisław piotrowicz LT (b. 1830) |
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wiktor piotrowicz Polish historian, PL (b. 1900) |
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karol piotrowicz PL (b. 1901) |
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| antoni piotrowicz (Polish, 1869–1923), PL (b. 1869) |
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| jan piotrowicz (b. 1861) |
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| wiktor piotrowicz (b. 1867) |
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| ludwik piotrowicz Polish historian, PL (b. 1886) |
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stanisław piotrowicz Polish politician, PL (b. 1952) |
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| mieczysław piotrowicz PL (b. 1905) |
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zbigniew piotrowicz PL (b. 1958) |
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robert piotrowicz Polish musician (b. 1973) |
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| edmund piotrowicz PL (b. 1915) |
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| maria piotrowicz (b. 1924) |
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| brunon piotrowicz PL (b. 1930) |
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