All over the world, Луен (Luyen 
, Luen 
, Louen 
) is quite a rare unisex first name. The given name Луен is characteristic of Macao, where it is quite a common feminine name, Hong Kong, where it is quite a rare gender-neutral name, and Vietnam, where it is quite a rare dominantly boy's, but infrequently female name. Measured by absolute frequency, it is commonest in Vietnam, Hong Kong, and the United States. More prevalently, Луен is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Luyen | Vietnam, China, United States, Malaysia, Taiwan |
| Luen | Vietnam, China, Malaysia, Hong Kong, Taiwan |
| Louen | Philippines, United States, Germany, Malaysia, France |
| Луен | Russia |