Surname Nittis (Nittis 
) , all around the world, is a rare cognomen. The family name Nittis is habitual in Greece, where it is a rare surname, Italy, and Australia, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Italy, Greece, and Germany. Likewise, Nittis is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Nittis | Germany, Italy, India, Greece, Brazil |
| giocondo de nittis IT (b. 1828) |
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| léontine de nittis Parisian (1843-1913), wife of the Italian painter Giuseppe De Nittis (b. 1843) |
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| giuseppe de nittis Ph.D. Scuola Internazionale Superiore di Studi Avanzati 2010 |
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| pasquelena de nittis researcher |
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