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Family name Dariani (Dariani , داريني ) , around the world, is quite a rare cognomen. The cognomen Dariani is characteristic of Iran, where it is quite a rare surname, Indonesia, where it is a rare surname, and Venezuela, where it is a very rare surname. In absolute terms, it most frequently occurs in Iran, Indonesia, and the United States. Very seldom, Dariani is the forename as well as the last name.