Family name Althoff (Althoff 
) , around the world, is quite a common cognomen. The family name Althoff is characteristic of Germany, where it is quite a rare surname, Austria, where it is a rare surname, and the United States. Measured by absolute frequency, it is commonest in Germany, the United States, and Brazil. Much less frequently, Althoff is the forename as well as the last name.
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| Althoff | Brazil, Sweden, United States, Germany, Austria |
| nicolaus althoff (b. 1752) |
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friedrich althoff German public servant and politician (1839-1908), DE (b. 1839) |
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| marie althoff (b. 1843) |
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hertha althoff vaudeville performer (b. 1905) |
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| theodor althoff German entrepreneur, DE (b. 1858) |
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| alphonse althoff German actor, DE (b. 1873) |
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| henry j. althoff Catholic bishop, US (b. 1873) |
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| karel althoff holocaust victim, b. 1880-10-11, CZ (b. 1880) |
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| hugo althoff prisoner of a Nazi regime (b. 1882) |
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| gustav althoff holocaust victim, b. 1883-12-11, CZ (b. 1883) |
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| hugo althoff German politician (1884-1960), DE (b. 1884) |
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| gustav althoff German film producer (1885-1948), DE (b. 1885) |
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k. h. althoff (b. 1925) |
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| charles r. althoff (1889-1962) actor, US (b. 1889) |
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gerd althoff German medievalist and historian, DE (b. 1943) |
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