Last name Ostermayer (Ostermayer 
) , in the world, is quite a rare cognomen. The family name Ostermayer is habitual in Austria, where it is quite a rare surname, Germany, where it is a rare surname, and Hungary. In absolute terms, it most frequently occurs in Germany, Austria, and the United States. Very seldom, Ostermayer is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ostermayer | Brazil, Canada, Germany, United States, Austria |
| georg ostermayer RO (b. 1535) |
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| augustin ostermayer DE (b. 1694) |
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ernst ludwig ostermayer German painter and photographer, DE (b. 1868) |
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| eugen ostermayer DE (b. 1849) |
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| max ostermayer DE (b. 1860) |
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| adolf ostermayer AT (b. 1867) |
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| erhard bernhard karl georg ostermayer DE (b. 1874) |
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christine ostermayer Austrian actress, AT (b. 1936) |
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| walter ostermayer German sculptor, DE (b. 1897) |
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fritz ostermayer musician, AT (b. 1956) |
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josef ostermayer Austrian politician, AT (b. 1961) |
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| vera ostermayer (b. 1956) |
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| christiane ostermayer DE (b. 1965) |
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| hieronymus ostermayer 16th-century chronicler |
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| friederike ostermayer |
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