All over the world, ค้อย (Khoi 
, ค้อย) is quite a common primarily male, but very infrequently female forename. The given name ค้อย is characteristic of Vietnam, where it is quite a rare male name, Australia, where it is a rare masculine name, and New Zealand. Not in comparison with a country's population, it is the most numerous in Vietnam, the United States, and India. Very seldom, ค้อย is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Khoi | Malaysia, Indonesia, India, Vietnam, United States |