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Surname Sibai (السباعي , Sibai , 思白 ) , worldwide, is a common cognomen. The last name Sibai is characteristic of Lebanon, where it is quite a common surname, Syria, and Libya (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in Egypt, Yemen, and Syria. Much less frequently, Sibai is the forename as well as the last name.