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Worldwide, Thien (Thien
, Thiên
, Тхиен
) is a common mostly boy's, but uncommonly female first name. The first name Thien is characteristic of Vietnam, where it is quite a common primarily male, but scarcely girly name, Macao, where it is quite a rare feminine name, and Australia, where it is a rare epicene name. Measured by absolute frequency, it is commonest in Vietnam, the United States, and Indonesia. Likewise, Thien is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Thien | Malaysia, Vietnam, Indonesia, United States, Germany |
| Thiên | Myanmar, Japan, France, Vietnam, United States |
| Тхиен | Belarus, Russia |
| ティエン | Japan |
Thien is also a name for the fictitious and mythical characters: .