Cognomen Trân (Trân , トラン ) , across the world, is a common family name. The cognomen Trân is habitual in Vietnam, where it is quite a common surname, Belgium, where it is a rare surname, and Australia, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Vietnam, France, and Belgium. Very seldom, Trân is the forename as well as the last name.