Family name Umbai (Umbai 
) , in the world, is a rare surname. The last name Umbai is habitual in Malaysia, where it is a very rare surname, Indonesia, and Nigeria, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Indonesia, China, and Malaysia. Also, Umbai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Umbai | Philippines, India, Indonesia, Malaysia, China |