Gianna is a female Italian given name, a diminutive form of Giovanna. In English it is translated as Joann or Joanna. These names both mean "God is gracious"or as some people say "the Lord is gracious" . See also "John (given name)" for the origin. Here are some names close to Gianna: Gia, Gina and Jenna. Here are some nicknames for Gianna: Gigi, Gia and Gi.