In all the world, Oanna (Oanna 
, Оанна 
) is a rare dominantly female, but infrequently male first name. The forename Oanna is habitual in Romania, where it is a rare female name, Greece, and Italy, where it is a very rare female name. In absolute terms, it most frequently occurs in Romania, China, and Greece. Also, Oanna is the last name as well as the forename.