Cognomen Northoff (Northoff 
) , across the world, is a rare last name. The family name Northoff is characteristic of Germany, where it is a rare surname, Austria, and Brazil, where it is an extremely rare surname. Very seldom, Northoff is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Northoff | Germany, Austria, Brazil |
| heinrich northoff DE (b. 1474) |
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| christian northoff DE (b. 1475) |
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| charles bernhard northoff GB (b. 1887) |
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| thomas northoff Austrian writer, AT (b. 1947) |
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| robert northoff DE (b. 1952) |
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| georg northoff German psychiatrist, DE (b. 1963) |
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| bernd h northoff researcher |
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| g. northoff researcher |
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| georg northoff researcher |
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| pia northoff German discus thrower, DE |
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