Cognomen เคอย (Khoei 
, เคอย 
) , worldwide, is a rare last name. The cognomen เคอย is habitual in Iran, where it is a rare surname, Sweden, and Canada, where it is a very rare surname. In absolute terms, it is the most numerous in Iran, Indonesia, and the United States. Much less frequently, เคอย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khoei | Iran, Sweden, United Kingdom, United States, Indonesia |
| เคอย | Thailand |