Sidonio \s(i)-do-nio\ as a boy's name is of Latin origin, and the meaning of Sidonio is "from Sidonia". Sidon was an area in the Middle East. Used as a girl's name in France.

Baby names that sound like Sidonio are Sidney, Seton, Sydney, Steno, Stoney and Stone. Other similar baby names are Dionio, Adonia, Addonia, Aidano, Gidon, Lidon, Simon, Simone, Sivnie and Tonio.