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Last name Layng (Layng , เล้ง) , worldwide, is a rare cognomen. The surname Layng is habitual in Canada, where it is a rare surname, Ireland, and the United Kingdom, where it is a very rare surname. Measured by absolute frequency, the name is most common in the United States, Canada, and the United Kingdom. Very seldom, Layng is the forename as well as the last name.