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Last name Batty (Batty , باتي , Бэтти ) , around the globe, is a common cognomen. The surname Batty is characteristic of Belize, where it is quite a common surname, the United Kingdom, where it is quite a rare surname, and Libya. Measured by absolute frequency, it is the most numerous in the United Kingdom, the United States, and Australia. Much less frequently, Batty is the forename as well as the last name.