Throughout the world, Castner (Castner 
) is a very rare boy's given name. Predominantly, Castner is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Castner | Canada, Switzerland, United States, Germany, Australia |
| kaspar castner DE (b. 1665) |
|
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|
hamilton castner American chemist, US (b. 1858) |
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