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Cognomen Kalthoum (كلثوم , Kalthoum , Кульсум ) , worldwide, is quite a rare last name. The family name Kalthoum is characteristic of Syria, where it is quite a rare surname, Tunisia, and United Arab Emirates. Measured by absolute frequency, it most frequently occurs in Syria, Tunisia, and Algeria. Predominantly, Kalthoum is the forename as well as the last name.