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Family name Mccay (麦凯 , Mccay , מקיי ) , throughout the world, is quite a rare cognomen. The last name Mccay is habitual in Jersey, where it is quite a common surname, Zimbabwe, where it is quite a rare surname, and Ireland. Not in comparison with a country's population, the name is most common in the United States, the United Kingdom, and Zimbabwe. Much less frequently, Mccay is the forename as well as the last name.