Family name Ciullo (Ciullo 
) , throughout the world, is quite a rare cognomen. The family name Ciullo is habitual in Italy, where it is quite a rare surname, Switzerland, and the United States, where it is a rare surname. Very seldom, Ciullo is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ciullo | Germany, Canada, Italy, United States, Switzerland |
| andrea ciullo Italian playwright, composer, artist and writer, IT (b. 1949) |
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| salvatore ciullo (b. 1968) |
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| francesco ciullo Italian footballer, IT (b. 1979) |
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| stephen ciullo researcher |
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| valentina ciullo researcher (ORCID 0000-0002-6870-6259) |
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| valentina ciullo researcher (ORCID 0000-0002-4095-7806) |
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| irene ciullo researcher |
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| alessio ciullo researcher |
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| enza ciullo author of Biblioteche Oggi |
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| alessandra ciullo Swiss association football player, CH (b. 1987) |
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| ciullo dell'arpa |
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| marina ciullo researcher |
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