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Family name Plooy (พลอย , Plooy ) , around the world, is quite a rare last name. The cognomen Plooy is characteristic of Sub-Saharan Africa, particularly Namibia, where it is quite a common surname, South Africa, where it is quite a rare surname, and Zimbabwe. Not in comparison with a country's population, this name is the most popular in South Africa, Namibia, and Netherlands. More prevalently, Plooy is the forename as well as the last name.