Last name Piitulainen (Piitulainen 
) , all around the world, is a rare cognomen. The cognomen Piitulainen is characteristic of Northern Europe, particularly Finland, where it is quite a rare surname, Sweden, where it is a rare surname, and Norway, where it is a very rare surname.
| VARIANT | COUNTRY |
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| Piitulainen | Norway, Sweden, Finland, United States, Spain |
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yrjö piitulainen Finnish boxer, FI (b. 1921) |
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| mikko piitulainen Finnish politician (1878-1935), FI (b. 1878) |
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harri piitulainen Finnish boxer, FI (b. 1947) |
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| marja-leena piitulainen Finnish linguist, FI (b. 1945) |
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| jaakko m piitulainen researcher |
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| harri piitulainen Finnish researcher, FI |
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| juha piitulainen FI |
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| eeva piitulainen FI |
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| jesper piitulainen Finnish ice hockey player, FI (b. 1991) |
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Mr, Mikko, Miika, Sanna, Sanni, Antti, Arttu, Katja, Kirsi, Petri, Pekka, Piitu, Roosa, Laura, Janne, Jaana, Jouni, Jukka, Tarja, Tapio, Terhi, Teemu, Minna, Mirko, Maija, Marja, Ms, Ari, Ida, Mika, Miia, Sari, Sami, Simo, Anna, Pasi, Tiina, Pyry, Joel, Juha, Timo, Tiia, Niku, Nina, Ella, Emma, Eero, Iida, Jari, and Noora