Family name 波森 (Posen 
, Porson 
, 波森 
) , around the world, is quite a rare last name. The surname 波森 is habitual in Israel, where it is quite a rare surname, the United Kingdom, and New Zealand. Not in comparison with a country's population, it most frequently occurs in the United Kingdom, the United States, and Canada. Much less frequently, 波森 is the forename as well as the last name.