Cognomen Tranc (Tranc 
) , in the entire world, is a rare family name. The cognomen Tranc is habitual in Romania, where it is a rare surname, Vietnam, where it is a very rare surname, and Canada, where it is an extremely rare surname. In absolute terms, this name is the most popular in Romania, Vietnam, and the United States. Much less frequently, Tranc is the forename as well as the last name.