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Last name Boulay (Boulay
, 布莱
, Буле
) , in the world, is a common cognomen. The family name Boulay is habitual in Saint Lucia, where it is quite a common surname, France, and Jersey (explore the name in all countries). Measured by absolute frequency, it is commonest in France, Canada, and the United States. Much less frequently, Boulay is the forename as well as the last name.