Last name Спірос (Spiros 
, Σπύρος , Спірос 
) , throughout the world, is a rare family name. The surname Спірос is habitual in Greece, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Australia. In absolute terms, it is the most numerous in the United States, Greece, and Australia. More frequently, Спірос is the forename as well as the last name.