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Cognomen Giannini (Стефания
, Giannini
, ジャンニーニ) , all around the world, is a common last name. The family name Giannini is habitual in San Marino, where it is a widespread surname, Italy, where it is quite a common surname, and Argentina, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Italy, the United States, and Argentina. Very seldom, Giannini is the forename as well as the last name.