Surname Sinkko (Sinkko 
) , globally, is a rare last name. The cognomen Sinkko is habitual in Finland, where it is quite a common surname, Australia, where it is a very rare surname, and the United States, where it is an extremely rare surname. In absolute terms, it most frequently occurs in Finland, the United States, and China.
| VARIANT | COUNTRY |
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| Sinkko | Australia, Finland, Spain, United States, China |
| antti sinkko Finnish politician, FI (b. 1806) |
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| elias sinkko Finnish politician, FI (b. 1871) |
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| erkki sinkko FI (b. 1938) |
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| irja maaret sinkko AU (b. 1965) |
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| eino sinkko FI |
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| päivi sinkko FI |
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| eija sinkko FI |
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Mr, Veli, Unto, Marko, Marja, Matti, Mauri, Minna, Mikko, Sanni, Seppo, Sofia, Scott, Antti, Antto, Kimmo, Petri, Pinja, Pirjo, Reijo, Risto, Riina, Eero, Erno, Elvi, Nina, Ms, Anu, Kht, Leo, Nea, Mika, Miia, Sari, Sami, Satu, Laura, Simo, Anna, Anne, Anni, Arja, Kari, Lisa, Jani, Jari, Juha, Toni, Suvi, and Liisa