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