Family name Landolt (Landolt 
) , worldwide, is quite a common cognomen. The surname Landolt is habitual in Switzerland, where it is quite a common surname, Portugal, where it is a rare surname, and Slovakia. Not in comparison with a country's population, it is the most numerous in Switzerland, the United States, and France. Very seldom, Landolt is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Landolt | Switzerland, United States, Germany, France, Portugal |
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salomon landolt Swiss artist (1741-1818), CH (b. 1741) |
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| hans kaspar landolt Swiss politician, 1702 - 1781, CH (b. 1702) |
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| johann heinrich landolt Swiss politician, 1721 - 1780, CH (b. 1721) |
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| jean conrad landolt CH (b. 1731) |
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| hans heinrich landolt Swiss politician (1763-1850), CH (b. 1763) |
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| johann rudolf landolt (1771-1850), CH (b. 1771) |
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elias landolt Swiss forester (1821-1896), CH (b. 1821) |
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| johann heinrich landolt (b. 1763) |
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| caspar josef landolt CH (b. 1767) |
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hans heinrich landolt Swiss chemist, 1831 - 1910, CH (b. 1831) |
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| matthias landolt Born 31 May 1786, in Zurich; died 20 October 1845, in Constance. Swiss, Painter, engraver., CH (b. 1786) |
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edmund landolt Swiss ophthalmologist (1846-1926), CH (b. 1846) |
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| johann heinrich landolt (b. 1792) |
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| fridolin josef landolt CH (b. 1806) |
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| johann ulrich landolt (1821-1881), CH (b. 1821) |
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