Last name Subainah (Subainah 
) , worldwide, is a very rare family name. The family name Subainah is habitual in Indonesia, where it is a very rare surname, Malaysia, where it is an extremely rare surname, and Nigeria. Very seldom, Subainah is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Subainah | Malaysia, Nigeria, Thailand, Indonesia |