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Family name Kulchan (Kulchan , Кульчан , กุลจันทร์ ) , in the world, is a rare last name. The surname Kulchan is characteristic of Thailand, where it is quite a rare surname, Georgia, where it is a very rare surname, and Ukraine, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Thailand, India, and Georgia. More prevalently, Kulchan is the forename as well as the last name.