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Family name Khoi (Khoi
, Khôi
, コイ
) , in all the world, is quite a common surname. The cognomen Khoi is characteristic of Vietnam, where it is quite a rare surname, Malaysia, and Taiwan, where it is a rare surname. In absolute terms, it most frequently occurs in South-eastern Asia, particularly Vietnam, Malaysia, and Indonesia. Also, Khoi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khoi | Malaysia, India, Vietnam, Indonesia, United States |
| Khôi | Vietnam, United States, United Kingdom, France |
| コイ | Japan |
| คอยด์ | Thailand |