Cognomen Umatambo (Umatambo 
) , in the world, is a very rare family name. The last name Umatambo is habitual in Ecuador, where it is a very rare surname, Spain, and Venezuela, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Ecuador, Spain, and the United States. Much less frequently, Umatambo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Umatambo | Ecuador, United States, Venezuela, Spain |