Last name Cicero (Cicero 
, Cícero 
, Cicerone 
) , worldwide, is a common cognomen. The last name Cicero is habitual in Italy, where it is quite a common surname, Argentina, where it is quite a rare surname, and the United States. Measured by absolute frequency, it is commonest in Italy, the United States, and Brazil. More prevalently, Cicero is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Cicero | Italy, Mexico, Brazil, United States, Argentina |
| Cícero | Brazil, United States, Argentina, Angola, Spain |
| Cicerone | Italy, France, Brazil, United States, Argentina |
| Цицерон | Russia, Kyrgyzstan |
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m.tullius m.f.m.n. cor. cicero Roman statesman, lawyer, orator, and philosopher (106–43 BC), IT (b. 106) |
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| m.tullius m.f.m.n. cicero Roman consul in 30 B.C., son of the famous orator, IT (b. 65) |
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| q.tullius q.f.m.n. cicero nephew of Cicero the orator, IT (b. 66) |
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| q.tullius m.f.m.n. cicero brother of Marcus Tullius Cicero, IT (b. 102) |
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| m.tullius cicero grandfather of the orator Cicero, IT (b. 200) |
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| m.tullius m.f. cicero father of the orator Cicero, IT (b. 200) |
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| l.tullius m.f. cicero uncle of the orator Cicero, IT (b. 200) |
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| c. calvius cicero (b. 500) |
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cicero stephens hawks American bishop (b. 1812) |
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| cicero comstock 19th century American politician, US (b. 1817) |
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| cicero c. hammock Confederate Army officer, US (b. 1823) |
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| cicero rufus perry (b. 1822) |
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| cicero richardson harris American bishop, US (b. 1844) |
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| cicero w. harris American journalist and author (b. 1847) |
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| cicero m. idleman American lawyer (1854-1943), US (b. 1854) |
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Melo, Franca, Martins, Santana, Almeida, Andrade, Barbosa, Batista, Bezerra, Pereira, Ribeiro, Freitas, Feitosa, Medeiros, Sobrinho, Carvalho, Ferreira, Oliveira, Conceicao, Rodrigues, Goncalves, Fernandes, Farias, Vieira, Junior, Barros, Cruz, Dias, Lima, Neto, Moura, Silva, Sousa, Souza, Alves, Costa, Cavalcante, Brito, Gomes, Leite, Lopes, Jesus, Nunes, Filho, Morais, Santos, Soares, Araujo, Rocha, and Nascimento