Family name Gstrein (Gstrein 
) , throughout the world, is quite a rare surname. The cognomen Gstrein is habitual in Austria, where it is quite a common surname, Switzerland, where it is a rare surname, and Australia. Not in comparison with a country's population, this name is the most popular in Austria, Germany, and Italy.
| VARIANT | COUNTRY |
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| Gstrein | Austria, Germany, Australia, Italy, Switzerland |
| josef gstrein (b. 1866) |
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| alois gstrein (b. 1869) |
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norbert gstrein Austrian bookwriter and writer, AT (b. 1961) |
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| lydia gstrein Austrian alpine skier, AT (b. 1931) |
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| heinz gstrein Austrian orientalist, theologian and foreign correspondent, AT (b. 1941) |
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| peter gstrein Austrian earth scientist and historian (1946-2021), AT (b. 1946) |
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| helmut gstrein Austrian alpine skier, AT (b. 1960) |
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| bernhard gstrein alpine skier, AT (b. 1965) |
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| vanessa gstrein researcher |
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| hugo gstrein Austrian cross-country skier, AT |
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| susanne gstrein researcher (ORCID 0000-0003-3654-0984) |
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| veronika gstrein Austrian association football player, AT |
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| marcus gstrein |
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| fabio gstrein Austrian alpine skier, AT (b. 1997) |
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| chiara gstrein Austrian association football player, AT |
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Mr, Marco, Matze, Silke, Simon, Allan, Alois, Anton, Antje, Chris, Conny, Cindy, Karin, Klara, Petra, Peter, David, Georg, Laura, Lukas, Mario, Maria, Ingo, Hugo, Ms, Ba, Dan, Joe, Eli, Eva, Flo, Anna, Anni, Josef, Anke, Ruth, Gabi, Lara, Lisa, Luca, Luka, Troy, Nina, Hans, Paul, and Julia