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In all the world, 大岩 (Dayan , 大岩 ) is a common unisex first name. The first name 大岩 is habitual in Sri Lanka, where it is quite a rare masculine name, Maldives, and Panama, where it is quite a rare unisex name. In absolute terms, it most frequently occurs in India, Sri Lanka, and Colombia. Likewise, 大岩 is the last name as well as the forename.