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Family name Creagh (克雷 , クレイ , Creagh ) , across the world, is quite a rare surname. The surname Creagh is habitual in Ireland, where it is quite a common surname, Australia, where it is quite a rare surname, and Cuba. Not in comparison with a country's population, it is commonest in China, the United States, and Australia. Likewise, Creagh is the forename as well as the last name.