Family name Ketola (Ketola 
) , in all the world, is quite a rare cognomen. The cognomen Ketola is habitual in Northern Europe, particularly Finland, where it is quite a common surname, Estonia, where it is quite a rare surname, and Sweden, where it is a rare surname. In absolute terms, the name is most common in Finland, the United States, and Sweden. Very seldom, Ketola is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ketola | Sweden, Finland, Ethiopia, Canada, United States |
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einari ketola Finnish actor (1904-1980), FI (b. 1904) |
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arvo ketola FI (b. 1921) |
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| jaakko s. ketola Finnish translator, FI (b. 1882) |
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| alfred ketola Finnish artist (1882-1965), RU (b. 1882) |
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| estella ketola Finnish communist., FI (b. 1895) |
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veli-pekka ketola ice hockey player, FI (b. 1948) |
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| jussi ketola FI (b. 1908) |
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| reino ketola Finnish judge (1928-2013), FI (b. 1928) |
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| helen ketola baseball player (1931-2016), US (b. 1931) |
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| inkeri ketola Finnish singer (1933-2005), FI (b. 1933) |
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| pentti ketola FI (b. 1925) |
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| erkki ketola FI (b. 1929) |
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| keijo ketola (b. 1929) |
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| kristiina ketola Finnish painter, FI (b. 1944) |
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| markku ketola Finnish musician (1945-1985), FI (b. 1945) |
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