Surname Tumoi (Tumoi 
) , in the world, is a very rare cognomen. The surname Tumoi is characteristic of Sub-Saharan Africa, particularly Tanzania, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Very seldom, Tumoi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tumoi | Tanzania, India, Nigeria, South Africa |