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Cognomen Лэй (Lei , Lay , Laye ) , in the world, is a prevalent last name. The family name Лэй is characteristic of Myanmar, where it is a prevalent surname, Macao, and Mongolia (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in Myanmar, China, and Mongolia. Much less frequently, Лэй is the forename as well as the last name.