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Family name יוסטוס (Justus , יוסטוס ) , globally, is a common cognomen. The last name יוסטוס is habitual in Sub-Saharan Africa, particularly Namibia, where it is quite a common surname, Kenya, where it is quite a rare surname, and Uganda. Measured by absolute frequency, this name is the most popular in the United States, Nigeria, and Kenya. Likewise, יוסטוס is the forename as well as the last name.