Family name เส็น (Sen 
, Freak , เส็น 
) , all around the world, is a widespread cognomen. The family name เส็น is habitual in Fiji, where it is quite a common surname, Malaysia, and India (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in India, Bangladesh, and Malaysia. Very seldom, เส็น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sen, Freak | Bangladesh, India, Indonesia, Malaysia, China |
| เส็น | Thailand |