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Surname Flay (福雷 , Flay , פליי ) , globally, is quite a rare family name. The last name Flay is habitual in New Zealand, where it is quite a rare surname, Angola, and Libya, where it is a rare surname. Measured by absolute frequency, it is the most numerous in the United Kingdom, China, and Angola. Also, Flay is the forename as well as the last name.