Cognomen Gagner (Gain 
, Gajni 
, Gagne 
) , in the entire world, is a widespread family name. The last name Gagner is habitual in Canada, where it is quite a common surname, India, and New Zealand, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in India, Canada, and Bangladesh. Much less frequently, Gagner is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gain | Canada, Bangladesh, United States, France, India |
| Gajni | North Macedonia, Saudi Arabia, United States, Germany, India |
| Gagne | Canada, Philippines, United States, France, India |
| Gagner | Canada, United States, New Zealand, France, India |
| lars peter gagner Swedish priest, SE (b. 1791) |
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wilhelm gagner SE (b. 1835) |
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| marie louise gagner Swedish writer, SE (b. 1868) |
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| emil gagner SE (b. 1877) |
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larry gagner American football player, offensive lineman, US (b. 1943) |
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sam gagner Canadian ice hockey player, CA (b. 1989) |
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| michel gagner Canadian surgeon, CA (b. 1960) |
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| dave gagner Canadian ice hockey player, CA (b. 1964) |
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