Cognomen Ruuth (Ruuth 
) , in all the world, is a rare family name. The last name Ruuth is characteristic of Northern Europe, particularly Finland, where it is quite a rare surname, Sweden, and Estonia, where it is a rare surname. In absolute terms, the name is most common in Finland, Sweden, and the United States. Very seldom, Ruuth is the forename as well as the last name.
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| Ruuth | Canada, Sweden, United States, Finland, India |
| christianus bartholdi ruuth (b. 1560) |
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| carl ruuth FI (b. 1590) |
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| jakob ruuth Bookkeeper, RU (b. 1654) |
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| gustaf ruuth (1681-1755) husband of Helena von der Hude, SE (b. 1681) |
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eric ruuth Swedish noble and politician (1746-1820), SE (b. 1746) |
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| gustaf ruuth (1697-1757), SE (b. 1697) |
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| christina helena ruuth wife of Anders Örbom Jr., SE (b. 1727) |
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gustaf eric ruuth SE (b. 1769) |
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| helena gustafsdotter ruuth wife of Erik Johan Örbom, SE (b. 1729) |
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hedvig eleonora ruuth SE (b. 1774) |
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johan christopher ruuth ii Swedish vicar (1823-1899), SE (b. 1823) |
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| katarina helena ruuth wife of Mikael Gustaf Huss, SE (b. 1797) |
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| elisabet charlotta ruuth SE (b. 1787) |
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| johanna gustava ruuth wife of Israel Näslund, SE (b. 1800) |
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wilhelm ruuth Finnish historian, FI (b. 1854) |
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Mr, Nico, Niko, Nooa, Elin, Enni, Emma, Eija, Heli, Vesa, Maria, Maija, Minna, Mikko, Sarah, Saila, Saara, Simon, Anton, Conny, Karen, Kalle, Teru, Jimi, Juho, Judy, Ms, Ari, Ero, Eva, Ida, Mats, Mika, Sari, Anne, Anni, Peder, Boel, Kati, Kent, Klas, Pasi, Rosa, Lars, Jani, Jari, John, Joni, Kari, and Peeaa