What does Cosmo mean?
Cosmo \c(o)-smo, cos-mo\ as a boys' name is of Italian and Greek origin, and the meaning of Cosmo is "order, harmony, beauty". Italian form of Greek Kosmas. Saint Cosmos, a martyr, was patron saint of the Italian city of Milan, and the name was further spread there by the fame of Cosimo de' Medici, Grand Duke of Tuscany and one of the chief patrons of the Italian Renaissance. His friend the Duke of Gordon took the name to Britain in the 17th century. Now also the name of an American soccer team.
Cosmo has 1 feminine form: Cosima.
Cosmo is an uncommonly occurring first name for men but a very prominent last name for all people (#60887 out of 150436, Top 40%). (2000 U.S. Census)
Charted below is the birth name popularity of Cosmo for boys. Cosmo has not been recorded in the list so far. (Top 1000 Birth Names Statistics, 2014)
A suggested similar baby name is Como. Like Cosmo, this name is not commonly used.