Cissy is of Latin origin, meaning 'sixth'. It's a diminutive form of the Latin numeral 'sex', which translates to six. This name was particularly popular during the Victorian era and has been used less frequently in recent times. It's considered unisex, though it's more commonly associated with females.
The name Cissy appears to have been quite popular from the late 1940s to the mid-1970s, with a peak of 26 births in 1971. After that, its popularity declined significantly, with only a few births per year. The total number of births with the name Cissy over this period is 430.