Family name Hardenburg (Hardenburg 
) , in all the world, is a rare cognomen. The cognomen Hardenburg is characteristic of the United States, where it is a very rare surname, New Zealand, and South Africa. In absolute terms, the name is most common in the United States, South Africa, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Hardenburg | Germany, United Kingdom, South Africa, United States, New Zealand |
| walter ernest hardenburg American writer (1886-1942), US (b. 1886) |
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| marguerite hardenburg wife of Frederick Cashow, US |
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| p. hardenburg British artist, active 1821 |
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