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Cognomen Галлай (Gallay , Gallai , Gallaj ) , worldwide, is quite a common last name. The last name Галлай is characteristic of Hungary, where it is quite a common surname, Switzerland, where it is quite a rare surname, and France. Not in comparison with a country's population, it is the most numerous in France, Hungary, and Argentina. Much less frequently, Галлай is the forename as well as the last name.