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In the entire world, Sanko (Sanko , Санко , Санько ) is quite a rare unisex first name. The first name Sanko is habitual in Japan, where it is a rare dominantly male, but uncommonly feminine name, Croatia, where it is a rare boy's name, and Bulgaria. Not in comparison with a country's population, it is the most numerous in Japan, India, and Ethiopia. Likewise, Sanko is the last name as well as the forename.