Hristiana is one of Hristina’s common nicknames and diminutives.
You will find name Hristiana written in different ways, since the romanization of such a name is vague, but the spelling Hristiana is closer to the Greek version.
Sound of name Hristiana: Hree-sti-á-na
Male Version of name Hristiana: Christos (from Christina)
Nameday of Hristina: December 25th and July 24th
Origin of name Hristiana
Since the name Hristiana (or Christianna) derives from the name Christina, it is also associated with the birth of Christ and Christmas, and with the Martyr Christina.
You can read all the pertinent information about the name Hristiana at the post for name Christina.