Cianna is a modern name that reads as a feminine form of the Irish Cian, "ancient" or "enduring", or as a respelling of the Italian-flavored Sienna and Gianna; most American families pronounce it like Sienna. It peaked at number 1,197 in 2006, when Sienna and Gianna were climbing, and has hovered between number 2,100 and 3,000 since, ranking number 2,697 in 2025 with 64 births.