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Family name Iordan (Йордан , Iordan , Иордан ) , in the world, is a common surname. The surname Iordan is characteristic of Bulgaria, where it is a common surname, Romania, where it is quite a common surname, and Aland Islands (explore the name in all countries). Not in comparison with a country's population, the name is most common in Eastern Europe, particularly Bulgaria, Romania, and Russia. Also, Iordan is the forename as well as the last name.