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Family name רונאי (Ronai , רונאי ) , around the world, is quite a rare cognomen. The surname רונאי is habitual in Hungary, where it is quite a common surname, Slovakia, where it is a rare surname, and Hong Kong. Measured by absolute frequency, the name is most common in Hungary, the United States, and Romania. Also, רונאי is the forename as well as the last name.