Meaning and name origin
Sigismundo \s(i)-gismun-do, sigi-smu-ndo\ as a boy's name is of Old German origin, and the meaning of Sigismundo is "victorious hand or protector". Sigismundo is a variant of Sigmund (Old German): name of a character from Wagner's "Ring" cycle of operas, son of the god Wotan, who fathers Siegfried on his own sister, Sieglinde. Not often used as a baby name.
Sigismundo is not a popular first name for males and an equally uncommon surname or last name for all people (Source: 2000 U.S. Population Census).
Displayed below is a comparison of the popularity of the boy name Sigismundo and its variant forms. The only popular variation form ranked in the Top 1000/100 is Sigmund. (Source: 2014 Birth Name Statistics).