80%RatingSave Gender Masculine Usage Italian (Rare) Pronounced Pron. /ˈkas.sjo/(Italian) /ˈkæs.i.oʊ/(English) [key·simplify] Meaning & HistoryExpand Links Italian form of Cassius. This is the surname of Othello's lieutenant Michael Cassio in Shakespeare's tragedy Othello (1603). Related NamesFamily Tree·Details Other Languages & CulturesCassius(Ancient Roman) Cássio(Portuguese) Same SpellingCássio PopularityDetails Last ranked #207 in 2000 Brazil (by decade) Categories rare Italian, Shakespearean characters