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Family name Сайлас (Silas , Sillas , Сайлас ) , across the world, is a common last name. The family name Сайлас is habitual in Vanuatu, where it is a common surname, Namibia, where it is quite a common surname, and Nigeria (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in Sub-Saharan Africa, particularly Nigeria, Ethiopia, and Tanzania. Likewise, Сайлас is the forename as well as the last name.