Family name Kerstner (Kerstner 
) , around the globe, is a rare last name. The cognomen Kerstner is habitual in Austria, where it is a rare surname, Croatia, and Hungary. Measured by absolute frequency, it is commonest in the United States, Brazil, and Germany. Much less frequently, Kerstner is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kerstner | Germany, United States, Hungary, Austria, Brazil |
| mladen kerstner Croatian writer (1928-1991), HR (b. 1928) |
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| erika kerstner DE (b. 1951) |
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| marija kerstner HR |
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| zvonko kerstner HR |
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