Cognomen Iselin (Iselin 
) , globally, is quite a rare family name. The cognomen Iselin is characteristic of Switzerland, where it is quite a rare surname, Australia, where it is a rare surname, and France. In absolute terms, the name is most common in Switzerland, the United States, and France. Likewise, Iselin is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Iselin | Norway, Switzerland, France, United States, Germany |
| hans lux iselin (b. 1486) |
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| ulrich iselin (1524-1564), CH (b. 1524) |
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| ludwig iselin (1559-1612), CH (b. 1559) |
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| fridolin iselin (1622-1705), CH (b. 1622) |
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jakob christoph iselin Swiss theologian, librarian and historian, CH (b. 1681) |
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| christoph iselin (b. 1645) |
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reinhard iselin Danish merchant (1715-1781), CH (b. 1714) |
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isaak iselin Swiss philosopher, CH (b. 1728) |
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| hans jakob iselin (b. 1675) |
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| johann jakob iselin (1704-1772), CH (b. 1704) |
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| johann rudolf iselin (1705-1779), CH (b. 1705) |
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| eleonora elisabetha iselin DE (b. 1708) |
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| anna maria preiswerk-iselin (1758-1840), CH (b. 1758) |
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| hieronimus iselin (b. 1756) |
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eleanora o'donnell iselin (1821-1897) (b. 1821) |
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