Cilla Lapham, character in "Johnny Tremain" by EstherForbes
Cilla Battersby-Brown, character on British soap "Coronation Street"
Cilla, two Greek mythological figures, the daughter of Hecuba or the daughter of Laomedon
Silla, novella from Barnabe Riche's 'Farewell to Militarie Profession'
Scylla, sea monster of Greek myth