Surname Kortelainen (Kortelainen 
, Кортелайнен 
) , around the world, is quite a rare last name. The last name Kortelainen is habitual in Northern Europe, particularly Finland, where it is quite a common surname, Sweden, where it is a rare surname, and Estonia. Not in comparison with a country's population, it most frequently occurs in Finland, Sweden, and Russia.
| VARIANT | COUNTRY |
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| Kortelainen | Austria, Germany, Finland, Sweden, China |
| Кортелайнен | Russia |
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jouni kortelainen Finnish distance runner, FI (b. 1957) |
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| yrjö kortelainen FI (b. 1907) |
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anna kortelainen Finnish scholar, art historian, writer, FI (b. 1968) |
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| karl kortelainen Soviet military officer (b. 1930) |
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| sirkka liisa kortelainen (b. 1921) |
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| jorma kortelainen Finnish cross-country skier and rower (1932-2012), FI (b. 1932) |
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| kauko kortelainen Finnish sculptor, FI (b. 1933) |
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| mika kortelainen Finnish ice hockey player, FI (b. 1967) |
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| kai kortelainen Finnish non-fiction writer, FI (b. 1971) |
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| mika kortelainen economist, FI |
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| ahti kortelainen Finnish record producer, FI |
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| juha kortelainen Finnish politician, FI |
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| matti j. kortelainen researcher |
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| juha kortelainen Ph.D. Oulun yliopisto 1982 |
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| juha m kortelainen researcher |
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Mr, Anni, Anja, Arto, Asko, Aira, Airi, Ahti, Kari, Kati, Kami, Kimi, Kyle, Panu, Pasi, Piia, Pyry, Rami, Rita, Riku, Jani, Jari, Anne, Anna, Suvi, Simo, Ms, Mia, Anu, Ari, Aki, Kai, Kia, Pia, Pã, Jan, Jasu, Nia, Esa, Mari, Mira, Miro, Mika, Miia, Sari, Sami, Satu, Sini, Nea, and Joni