Family name Трани (Trani 
, Трани 
) , in the world, is quite a common cognomen. The cognomen Трани is characteristic of Italy, where it is quite a rare surname, Luxembourg, and Argentina, where it is a rare surname. Measured by absolute frequency, it is commonest in Italy, the United States, and France. Much less frequently, Трани is the forename as well as the last name.