Cognomen Ismana (Ismana 
) , in all the world, is a rare family name. The cognomen Ismana is habitual in Romania, where it is quite a rare surname, Indonesia, where it is a rare surname, and Italy, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Indonesia, Romania, and Nigeria. Much less frequently, Ismana is the forename as well as the last name.