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Surname Rubai (ربيع , Rubai , 如柏 ) , around the world, is a widespread cognomen. The surname Rubai is characteristic of Egypt, where it is a common surname, Palestinian Territory, where it is quite a common surname, and Jordan (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in Egypt, Syria, and Sudan. Likewise, Rubai is the forename as well as the last name.