Family name Helfenstein (Helfenstein 
) , around the world, is quite a rare surname. The cognomen Helfenstein is habitual in Switzerland, where it is quite a common surname, Germany, where it is a rare surname, and the Dominican Republic. Not in comparison with a country's population, the name is most common in Switzerland, Brazil, and Germany.
| VARIANT | COUNTRY |
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| Helfenstein | Brazil, France, Germany, United States, Switzerland |
| eberwin von helfenstein DE (b. 1100) |
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| berthold von helfenstein Bishop of Chur, CH (b. 1200) |
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| beatrix of helfenstein-wiesensteig Countess of Oettingen (b. 1356) |
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| louis iii, count of helfenstein German count at Wiesensteig (b. 1412) |
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| sibylla von helfenstein Abbess, CH (b. 1450) |
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| conrad ii, count of helfenstein German count at Blaubeuren (b. 1450) |
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| ulrich von helfenstein German count at Wiesensteig, DE (b. 1486) |
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| georg ii. graf von helfenstein German count at Wiesensteig-Gundelfingen, DE (b. 1518) |
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| ulrich xii, count of helfenstein German count at Wiesensteig-Wellerheim (b. 1524) |
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| schweikhart von helfenstein German count at Wiesensteig-Gundelfingen, and judge, DE (b. 1539) |
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| gregor helfenstein DE (b. 1559) |
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| georg wilhelm graf von helfenstein German count at Wiesensteig-Gundelfingen, IT (b. 1605) |
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| catharine helfenstein (b. 1817) |
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hermann hess helfenstein Swiss naturalist, explorer, climber and engineer (b. 1916) |
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| edward trail helfenstein US (b. 1865) |
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