Cissy

Cissy is an English pet form of Cecil or, more commonly, of Cecilia, itself derived from the Latin family name Caecilia, which is connected to the Roman clan name Caecus meaning blind. The name gained affectionate use as a nursery diminutive in Britain and the United States during the nineteenth and early twentieth centuries, borne by various figures in popular culture and fiction. Related forms include Cecily, Celia, Cissie, and Sissy.