Last name Сирен (Siren 
, Syren 
, Сирен 
) , around the world, is quite a common surname. The cognomen Сирен is characteristic of Northern Europe, particularly Finland, where it is quite a common surname, Sweden, where it is quite a rare surname, and Estonia. Measured by absolute frequency, it is the most numerous in Finland, Sweden, and the United States. Much less frequently, Сирен is the forename as well as the last name.