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Surname Glasscock (Glas , Glasscock ) , in the entire world, is a common last name. The family name Glasscock is characteristic of Western Europe, particularly Netherlands, where it is quite a common surname, Austria, where it is quite a rare surname, and Germany. Not in comparison with a country's population, the name is most common in Germany, the United States, and Netherlands. Much less frequently, Glasscock is the forename as well as the last name.