Cognomen Sweyen (Sweyen 
) , worldwide, is a very rare last name. The last name Sweyen is characteristic of Netherlands, where it is a very rare surname, Germany, where it is an extremely rare surname, and Peru. Not in comparison with a country's population, it is commonest in Netherlands, Germany, and India.
| VARIANT | COUNTRY |
|---|---|
| Sweyen | Germany, India, Peru, Netherlands |