Family name Haas (Has 
, Hase , Haas , and others...) , all around the world, is a widespread cognomen. The family name Haas is habitual in Western Europe, particularly Liechtenstein, where it is a common surname, Austria, and Germany, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, it is commonest in Germany, the United States, and India. Very seldom, Haas is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Has, Hase, Haas | Turkey, India, Austria, United States, Germany |
| 哈斯 | China |
| ハース | Japan |
| Хас | Kazakhstan, Kyrgyzstan, Russia, Ukraine |
| Хаас | Russia, Ukraine |
| هاس | Yemen |
| האס | Israel |
| jakob haas IT (b. 1200) |
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conrad haas Austrian military engineer, AT (b. 1509) |
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| gallus haas DE (b. 1500) |
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| matthäus haas (b. 1595) |
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| petrus haas DE (b. 1608) |
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| christoph haas (b. 1609) |
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| johann wilhelm haas Trumpet maker from Nuremberg, Germany (1649-1723) (b. 1649) |
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| sebastian haas CH (b. 1641) |
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| karl haas SI (b. 1657) |
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| johannes gottlieb haas 1689-1727; Diakon, Philosoph (b. 1689) |
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| matthaeus haas (b. 1682) |
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| václav haas Czech composer and organist, CZ (b. 1694) |
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| martin haas (b. 1691) |
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johann christof haas Austrian painter (1753-1829), AT (b. 1753) |
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| johann martin haas DE (b. 1696) |
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