Cognomen Fehlberg (Fehlberg 
) , around the world, is quite a rare last name. The last name Fehlberg is characteristic of Australia, where it is a rare surname, Germany, and Brazil. In absolute terms, it is the most numerous in Germany, Brazil, and the United States.
| VARIANT | COUNTRY |
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| Fehlberg | Australia, Germany, Brazil, New Zealand, United States |
| erwin fehlberg German mathematician, DE (b. 1911) |
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| gothardt fehlberg German parson (b. 1913) |
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| elizabeth a fehlberg researcher |
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| shannon d fehlberg researcher (ORCID 0000-0002-7386-0832) |
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| ariana fehlberg Brazilian politician, BR (b. 1980) |
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| ferdinand fehlberg |
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| marja fehlberg |
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| emma fehlberg |
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| frank fehlberg (b. 1981) |
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