Cognomen Gailer (Gailer 
) , throughout the world, is quite a rare family name. The surname Gailer is characteristic of Austria, where it is quite a rare surname, New Zealand, and Albania, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Germany, Austria, and Australia.
| VARIANT | COUNTRY |
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| Gailer | Germany, Austria, Australia, Switzerland, New Zealand |
| jacob eberhard gailer DE (b. 1792) |
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| norbert gailer (b. 1943) |
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| peter gailer German ice hockey player, DE (b. 1956) |
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| georg gailer German ice hockey player, DE (b. 1971) |
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| john gailer Peerage person ID=619210 |
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| judith ann gailer Peerage person ID=619211 |
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| j gailer researcher |
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| thomas gailer German volleyball player, DE (b. 1981) |
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| rosa gailer |
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