Last name Fenstermacher (Fenstermacher 
) , all around the world, is quite a rare family name. The last name Fenstermacher is habitual in Germany, where it is quite a rare surname, the United States, where it is a rare surname, and New Zealand. Measured by absolute frequency, it is commonest in Germany, the United States, and Canada.
| VARIANT | COUNTRY |
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| Fenstermacher | Germany, Canada, Venezuela, New Zealand, United States |
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frank fenstermacher German musician, DE (b. 1955) |
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| theodore fenstermacher chief prosecutor at Hostages Trials, US (b. 1918) |
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| gary d. fenstermacher (b. 1939) |
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| david fenstermacher researcher |
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| max e. fenstermacher fusion energy researcher at LLNL |
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| joselyn fenstermacher botanist |
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| katherine j fenstermacher researcher |
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