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Family name Preng (Preng , เปร่ง) , all over the world, is a rare surname. The family name Preng is characteristic of Sub-Saharan Africa, particularly Botswana, where it is quite a rare surname, Namibia, and Zimbabwe, where it is a rare surname. In absolute terms, it is commonest in Sub-Saharan Africa, particularly Botswana, Zimbabwe, and South Africa. Also, Preng is the forename as well as the last name.