Cognomen トレイン (Train 
, トレイン) , in all the world, is quite a rare last name. The last name トレイン is habitual in the United Kingdom, where it is a rare surname, Australia, and France. Not in comparison with a country's population, it is commonest in the United States, the United Kingdom, and France. Much less frequently, トレイン is the forename as well as the last name.