Cognomen Kostner (Kostner 
, Костнер 
) , in the world, is quite a rare last name. The last name Kostner is characteristic of Austria, where it is quite a rare surname, Italy, and North Macedonia, where it is a rare surname. Not in comparison with a country's population, it is commonest in Italy, Austria, and the United States. Very seldom, Kostner is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kostner | Austria, Italy, Germany, United States, Czechia |
| Костнер | Kazakhstan, Russia |
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alois kostner painter (1856-1918), IT (b. 1856) |
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| maria aloisa kostner AT (b. 1868) |
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josef kostner Italian poet and sculptor (1933-2017), IT (b. 1933) |
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| franz kostner IT (b. 1877) |
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norbert kostner Italian cook, IT (b. 1945) |
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ulrico kostner Italian cross-country skier, IT (b. 1946) |
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| cesco kostner Italian alpine skier and mountaineer, IT (b. 1905) |
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| josef kostner (b. 1905) |
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isolde kostner Italian alpine skier, IT (b. 1975) |
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| erich kostner IT (b. 1921) |
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carolina kostner Italian figure skater, IT (b. 1987) |
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patrick kostner Austrian footballer, AT (b. 1988) |
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simon kostner Italian ice hockey player, IT (b. 1990) |
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nadine kostner Italian ski jumper, IT (b. 1992) |
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diego kostner Italian ice hockey player, IT (b. 1992) |
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