Cognomen Secondo (Segun 
, Secondo 
, Secundo 
) , around the globe, is a widespread family name. The cognomen Secondo is habitual in Nigeria, where it is quite a common surname, Iceland, and Niger, where it is quite a rare surname. In absolute terms, the name is most common in Nigeria, Brazil, and Italy. Likewise, Secondo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Segun | Philippines, Italy, Brazil, Niger, Nigeria |
| Secondo | Colombia, Philippines, Italy, Brazil, United States |
| Secundo | Philippines, Italy, Brazil, United States, Mexico |
| Sekonda | United States, India, Tanzania |
| tito petronio secondo Roman praetorian prefect from 94 to 96 AD, IT (b. 40) |
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san secondo soldier, IT (b. 250) |
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| giacomo da san secondo IT (b. 1468) |
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| giuseppe maria secondo born 1715; died 1798 (b. 1715) |
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pier maria rosso di san secondo Italian playwright, journalist and writer, IT (b. 1887) |
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| louis j. secondo Roman Catholic clergyman (b. 1915) |
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| álvaro secondo Uruguayan writer, UY (b. 1951) |
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| lynn e secondo researcher ORCID ID = 0000-0003-1723-3997 |
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| agnese secondo researcher |
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| riccardo secondo association football player, IT (b. 1995) |
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Lual, Martino, Mancini, Maschio, Moretti, Casadei, Bianchi, Profilo, Raviola, Damiano, Damonte, Gentili, Virgili, Fantini, Ferrero, Ferrari, Zattini, Sandiano, Bernardi, Bosticco, Pallanca, Marinelli, Orsini, Franco, Fabbri, Fanola, Monti, Musso, Conti, Pippo, Rossi, Ricci, Righi, Gallo, Leoni, Amante, Montanari, Coccia, Bianco, Parodi, Rocchi, Riccò, Docimo, Guerra, Lunati, Tomasi, Nivolo, Vitali, Boschi, and Cusinatti