Family name Loeffen (Loeffen 
) , in all the world, is quite a rare surname. The family name Loeffen is habitual in Netherlands, where it is quite a rare surname, New Zealand, where it is a rare surname, and Belgium. Measured by absolute frequency, it is the most numerous in Netherlands, Germany, and Canada.
| VARIANT | COUNTRY |
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| Loeffen | Canada, Germany, Netherlands, United States, Belgium |
| ger loeffen NL (b. 1950) |
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| huub loeffen Dutch footballer, NL (b. 1972) |
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| esther loeffen Dutch diplomat |
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| erik a h loeffen researcher |
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| ronnie lambertus loeffen Ph.D. University of Bath 2008 |
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| willie loeffen researcher |
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| sandor loeffen (b. 1979) |
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| jos loeffen |
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| ingrid loeffen |
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| weurt ger loeffen |
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| sandor loeffen |
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