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Family name Isaia (Isaia , Исайя, איסאיה ) , globally, is quite a common cognomen. The last name Isaia is habitual in Cyprus, where it is quite a common surname, Italy, where it is quite a rare surname, and Greece. Measured by absolute frequency, this name is the most popular in Italy, Argentina, and France. Likewise, Isaia is the forename as well as the last name.