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Last name Petrescu (Petrescu , פטרסקו , Петреску ) , all around the world, is a common cognomen. The family name Petrescu is characteristic of Romania, where it is a common surname, Finland, where it is a rare surname, and Afghanistan. Measured by absolute frequency, it most frequently occurs in Romania, Italy, and Afghanistan. Much less frequently, Petrescu is the forename as well as the last name.