Updated June 9, 2019 Find Baby Names Girl name origins & meanings American : From the name Cecilia; familiar name for “sister” Girl name variations Sissy Sissy 0 % this year Feminine Rare READ MORE DETAILS Cissee Cissee 0 % this year Feminine Rare READ MORE DETAILS Cissey Cissey 0 % this year Feminine Rare READ MORE DETAILS Cissy Cissy 0 % this year Feminine Rare READ MORE DETAILS Sissi Sissi 0 % this year Feminine Rare READ MORE DETAILS Sissie Sissie 0 % this year Feminine Rare READ MORE DETAILS Family name origins & meanings Czech : nickname from an altered form of the German adjective süss ‘sweet’, ‘sweet-natured’ (see Suess).