Cognomen Opfer (Ofiara 
, Ofero 
, Opfer 
) , across the world, is quite a rare family name. The cognomen Opfer is characteristic of Germany, where it is quite a rare surname, Poland, where it is a rare surname, and the United States. Also, Opfer is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ofiara | Poland, Canada, France, Germany, United States |
| Ofero | United States, Philippines |
| Opfer | United Kingdom, Canada, Argentina, Germany, United States |
| Опфер | Ukraine, Kyrgyzstan, Kazakhstan, Russia |
| david opfer DE (b. 1825) |
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| felix opfer Holocaust victim, born 1865-07-15, DE (b. 1865) |
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| fanny opfer German singer, DE (b. 1870) |
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| dorothea fanny opfer holocaust victim, b. 1882-05-18, PL (b. 1882) |
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| gustav opfer DE (b. 1876) |
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| darrell opfer American politician, US (b. 1941) |
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| gerhard opfer (b. 1935) |
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| george joseph opfer US (b. 1947) |
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| roland opfer German rower, DE (b. 1974) |
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| david h. e. opfer United States Air Force press officer |
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| roland opfer Dr. rer. nat. Georg-August-Universität Göttingen 2004 |
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| john e opfer researcher |
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| gerhard opfer Ph.D. Universität Hamburg 1967 |
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| roland opfer researcher |
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