Cognomen ஜஸ்டின் (Castin 
, ஜஸ்டின்) , all around the world, is quite a rare surname. The last name ஜஸ்டின் is habitual in Haiti, where it is quite a rare surname, Belgium, and France, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Philippines, France, and Haiti. Very seldom, ஜஸ்டின் is the forename as well as the last name.