Cognomen Giertych (Giertych 
) , throughout the world, is a rare last name. The family name Giertych is habitual in Poland, where it is a rare surname, the United States, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Also, Giertych is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Giertych | United Kingdom, Canada, Poland, France, United States |
| franciszek giertych (b. 1868) |
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maciej giertych Polish politician, PL (b. 1936) |
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wojciech giertych Roman Catholic priest, PL (b. 1951) |
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| jędrzej giertych Polish politician (1903-1992), PL (b. 1903) |
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roman jacek giertych Polish politician, PL (b. 1971) |
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| marian giertych Polish botanist, PL (b. 1965) |
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| piotr giertych Polish forestry engineer, educator and catechist (1974-), PL (b. 1974) |
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