Family name Коуен (Cowen 
, Коуен 
) , in the world, is quite a common surname. The surname Коуен is characteristic of Guernsey, where it is quite a common surname, Australia, where it is quite a rare surname, and the United Kingdom. Not in comparison with a country's population, the name is most common in the United States, the United Kingdom, and Australia. Very seldom, Коуен is the forename as well as the last name.