Cognomen Siro (Siro 
, Syrus 
, Сиро 
) , worldwide, is quite a common family name. The surname Siro is habitual in Vanuatu, where it is quite a common surname, Kenya, where it is quite a rare surname, and Hungary. Measured by absolute frequency, this name is the most popular in Kenya, Spain, and India. Likewise, Siro is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siro | Spain, Italy, India, Indonesia, Kenya |
| Syrus | Spain, Brazil, India, Indonesia, Kenya |
| Сиро | Kazakhstan, Armenia, Russia, Ukraine |
| francesco maria di san siro IT (b. 1658) |
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paavo siro Finnish linguist, FI (b. 1909) |
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fernando siro Argentine actor and film director (1931-2006), AR (b. 1931) |
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juha siro FI (b. 1951) |
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| raúl fernández siro (b. 1908) |
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| mathieu siro French rugby union player, FR (b. 1981) |
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| väinö siro FI |
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| lan siro MY (b. 1982) |
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| mr. siro (b. 1982) |
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| sini siro sportsperson, FI |
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