Sandro is also commonly used in Georgia, where it is currently a top 10 name. Sandro was originally a short form of Aleksandre, but has since become an independent name in Georgia. A funny tidbit: both Aleksandre and Sandro are in the top 10 names for boys in Georgia! (Aleksandre is #2 and Sandro is #10.) So, ultimately, it's really just the same name twice in the top 10 there.Anyway, in Georgian, Sandro is written as: სანდრო. [noted -ed]
Also Portuguese:
https://pt.m.wiktionary.org/wiki/Sandro
https://www.behindthename.com/name/sandro/top/portugal
https://www.behindthename.com/name/sandro/top/brazil