Cássio is the Portuguese form of the ancient Roman family name Cassius. It is used as a male given name, and its equivalent in English is Cassius.EtymologyThe Roman name Cassius is possibly derived from Latin cassus meaning “empty, vain.” It was borne by several notable figures in antiquity, including the 3rd-century Roman historian Lucius Cassius Dio, and was also the name of several early saints.Cultural SignificanceWhile Cassius is known in the English-speaking world partly due to figures such as Muhammad Ali (born Cassius Clay) and the American abolitionist Cassius Clay, the Portuguese form Cássio has its own distinct presence in Portuguese-speaking countries, particularly Brazil. It has been a consistently popular name among Brazilian men, reflecting the broader adoption of Roman and Greek names in Portuguese onomastics.Related FormsThe feminine form of Cássio is Cássia, which shares the same origin. In other languages, the name appears as Cassio in Italian and Cassius in various modern languages influenced by Latin culture.Meaning: possibly “empty, vain” from Latin cassusOrigin: Roman family name, Portuguese adaptationType: first nameUsage regions: Portugal, Brazil