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Cognomen Siyam (Siyam , صيام , سيام ) , throughout the world, is a common surname. The last name Siyam is characteristic of Palestinian Territory, where it is a common surname, Jordan, where it is quite a common surname, and Maldives (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in Egypt, Palestinian Territory, and Bangladesh. Much less frequently, Siyam is the forename as well as the last name.