Family name サイレン (Siren 
, サイレン) , in the world, is quite a rare cognomen. The family name サイレン is habitual in Northern Europe, particularly Finland, where it is quite a common surname, Estonia, where it is quite a rare surname, and Sweden. Not in comparison with a country's population, it most frequently occurs in Finland, the United States, and Indonesia. Also, サイレン is the forename as well as the last name.