Family name Hardt (Hardt 
, ハート 
, 哈特 
, along with others...) , all around the world, is a common cognomen. The family name Hardt is characteristic of Western Europe, particularly Luxembourg, where it is quite a common surname, Germany, and Austria, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Germany, the United States, and Brazil. Much less frequently, Hardt is the forename as well as the last name.
| richard hardt (b. 1587) |
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| hermann von der hardt (b. 1631) |
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johann daniel hardt German composer, DE (b. 1696) |
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| martha hardt (b. 1637) |
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| richard von der hardt Swedish writer, SE (b. 1650) |
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| johann gottlieb hardt German author, DE (b. 1658) |
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| erdwin von der hardt (b. 1656) |
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| friedrich flender von der hardt (b. 1674) |
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ignaz hardt DE (b. 1749) |
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| anton julius von der hardt (b. 1707) |
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| johanna juliana von der hardt (b. 1712) |
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| christian fredrik hardt SE (b. 1715) |
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| joachim friedrich von der hardt DE (b. 1719) |
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mathias hardt (1809-1877), LU (b. 1809) |
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| ignatz hardt German politician, DE (b. 1783) |
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