Cognomen Dooi (Dooi 
) , globally, is a very rare family name. The family name Dooi is habitual in Malaysia, where it is a rare surname, Thailand, where it is a very rare surname, and South Africa. Much less frequently, Dooi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dooi | South Africa, Malaysia, Thailand, United States, India |