Last name Ratilainen (Ratilainen 
) , all around the world, is a rare cognomen. The surname Ratilainen is characteristic of Northern Europe, particularly Finland, where it is quite a common surname, Estonia, where it is a rare surname, and Sweden. Not in comparison with a country's population, the name is most common in Finland, Sweden, and the United States.
| VARIANT | COUNTRY |
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| Ratilainen | Estonia, Canada, Finland, Sweden, United States |
| iisakki ratilainen Finnish swimmer, FI (b. 1986) |
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| jani ratilainen FI |
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| timo ratilainen FI |
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| jouko ratilainen FI |
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| tanja ratilainen FI |
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| ella ratilainen Finnish aesthetic group gymnast, FI (b. 1997) |
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Mr, Jari, Joni, Juha, Juho, Taru, Tomi, Tero, Timo, Tiia, Nico, Niko, Ella, Essi, Emmi, Eija, Heli, Iina, Iida, Maria, Marko, Marjo, Lari, Marja, Riku, Pasi, Ms, Ann, Ari, Aki, Kai, Eki, Mari, Miro, Mino, Mika, Miia, Sami, Samu, Simo, Anna, Anne, Anni, Arto, Aino, Aaro, Kari, Roni, and Matti