Cognomen Trann (Trann 
, تران) , in the world, is a rare family name. The cognomen Trann is characteristic of Canada, where it is a rare surname, Vietnam, where it is a very rare surname, and New Zealand. Not in comparison with a country's population, it most frequently occurs in Vietnam, Canada, and the United States. Very seldom, Trann is the forename as well as the last name.