Family name Gierth (Gierth 
) , globally, is quite a rare cognomen. The surname Gierth is characteristic of Germany, where it is quite a rare surname, Poland, where it is a very rare surname, and Spain. Measured by absolute frequency, it is commonest in Germany, the United States, and the United Kingdom. Much less frequently, Gierth is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gierth | Germany, Poland, United States, United Kingdom, Democratic Republic of the Congo |
| martin gierth (b. 1898) |
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| hans-joachim gierth chess player (b. 1950) |
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| lukas gierth researcher (ORCID 0000-0001-5550-9304) |
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| ramona gierth |
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| ina gierth |
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| wilhelm gierth |
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| elke gierth |
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| david gierth |
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| lisa gierth German association football player, DE (b. 1998) |
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Mr, Eric, Hans, Olaf, Mario, Marco, Mandy, Sonja, Andre, Annie, Armin, Clare, Cindy, Basak, Bernd, Katja, Klaus, Petra, Peter, Robin, Ronny, Gerda, Jens, John, Jana, Lutz, Ms, Ed, Ann, Roy, Jã, Uwe, Mary, Mark, Sven, Anna, Georg, Anne, Kurt, Paul, Ralf, Rene, Rich, Dawn, Gary, Lars, Lisa, Luca, Karl, and Lukas