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Cognomen Chaian (Чаян , Chaian , Шаян ) , globally, is a rare surname. The cognomen Chaian is characteristic of Kyrgyzstan, where it is a rare surname, Ukraine, and Kazakhstan, where it is a very rare surname. In absolute terms, the name is most common in Ukraine, Russia, and Kyrgyzstan. Likewise, Chaian is the forename as well as the last name.