Surname Ruohonen (Ruohonen 
) , around the world, is quite a rare cognomen. The cognomen Ruohonen is characteristic of Northern Europe, particularly Finland, where it is quite a common surname, Estonia, where it is a rare surname, and Sweden. Measured by absolute frequency, the name is most common in Finland, the United States, and Sweden.
| VARIANT | COUNTRY |
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| Ruohonen | Finland, Sweden, United Kingdom, United States, China |
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pirkko ruohonen-lerner Finnish politician, FI (b. 1957) |
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| pentti ruohonen FI (b. 1931) |
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| seppo ruohonen Finnish opera singer, FI (b. 1946) |
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| juhani ruohonen Finnish ice hockey player, FI (b. 1947) |
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| matti ruohonen Finnish singer, FI (b. 1949) |
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| ilkka ruohonen Finnish anthropologist, FI (b. 1958) |
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| laura ruohonen Finnish playwright, dramaturge and theatre director, FI (b. 1960) |
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| anna ruohonen Finnish designer, FI (b. 1967) |
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| kai ruohonen Finnish painter, FI (b. 1969) |
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| rich ruohonen American (US) male curler, US (b. 1971) |
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| katja ruohonen badminton player, FI (b. 1976) |
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| toni ruohonen Ph.D. Jyväskylän yliopisto 2007, FI |
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| oskari ruohonen Finnish musician, FI |
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| elina ruohonen (b. 1970) |
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| keijo ruohonen Ph.D. Turun yliopisto 1976 |
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Mr, Suvi, Anna, Anne, Anni, Anja, Anju, Arja, Aino, Aila, Aaro, Beth, Kari, Kati, Kurt, Kira, Pasi, Piia, Pyry, Rami, Rich, Rita, Sini, Ryan, Saku, Samu, Ms, Ann, Ada, Aki, Ben, Rã, Guy, Jan, Jay, Jon, Nea, Esa, Mari, Mark, Mira, Miro, Mika, Miko, Sara, Sari, Sami, Satu, and Gene