Cognomen Lähdesmäki (Lähdesmäki 
) , all around the world, is a rare surname. The last name Lähdesmäki is characteristic of Finland, where it is quite a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Lähdesmäki | Finland, United States |
| eero lähdesmäki Finnish pole vaulter (1914-1941), FI (b. 1914) |
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| martti lähdesmäki Finnish surgeon and politician (1931-2006), FI (b. 1931) |
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| markku lähdesmäki Finnish photographer, FI (b. 1958) |
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| elias lähdesmäki (b. 1950) |
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| kalle lähdesmäki FI (b. 1952) |
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| tuuli lähdesmäki Finnish researcher, FI (b. 1976) |
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| tuire lähdesmäki researcher |
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| ilkka johannes lähdesmäki Ph.D., Chemistry, University of Washington, 1999 |
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| juhana lähdesmäki FI |
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| kirsti lähdesmäki FI |
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| harri lähdesmäki |
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| matteus lähdesmäki FI (b. 1987) |
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Ari, Eeva, Heli, Heta, Iina, Olli, Ossi, Otto, Marko, Mauri, Milla, Saila, Seppo, Antti, Anssi, Arttu, Katja, Kaisa, Pekka, Piitu, Raija, Risto, Eero, Emmi, Esko, Elli, Ada, Aki, Kai, Ice, Mari, Mika, Satu, Sini, Anna, Anne, Laura, Arto, Aino, Aija, Kari, Rita, Lisa, Jani, Joni, Juho, Timo, Nico, Arja, and Lauri