Last name Antain (Tant 
, Antain 
) , throughout the world, is quite a common cognomen. The last name Antain is habitual in Myanmar, where it is quite a rare surname, Belgium, and France, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Myanmar, the United States, and France. Much less frequently, Antain is the forename as well as the last name.