Family name Κασσιανή (Cassius 
, Kassiani 
, Kasja 
) , in all the world, is quite a rare last name. The last name Κασσιανή is habitual in Saint Lucia, where it is quite a common surname, Greece, and New Zealand, where it is a rare surname. Not in comparison with a country's population, the name is most common in Greece, Indonesia, and Tanzania. More frequently, Κασσιανή is the forename as well as the last name.