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Surname Slade (Slade , سليد, Слэйд) , across the world, is a common family name. The family name Slade is characteristic of Isle of Man, where it is quite a common surname, the United Kingdom, and New Zealand, where it is quite a rare surname. In absolute terms, this name is the most popular in the United States, the United Kingdom, and Australia. Very seldom, Slade is the forename as well as the last name.