Cognomen Дорган (Dorgan 
, Дорган 
) , all over the world, is quite a rare last name. The surname Дорган is characteristic of Ireland, where it is quite a common surname, Moldova, where it is quite a rare surname, and New Zealand, where it is a rare surname. Measured by absolute frequency, it is commonest in the United States, Ireland, and the United Kingdom. Much less frequently, Дорган is the forename as well as the last name.