Cognomen Isumo (Isumo 
) , all around the world, is a very rare last name. The cognomen Isumo is habitual in Tanzania, where it is a rare surname, Venezuela, where it is an extremely rare surname, and Nigeria. Not in comparison with a country's population, it is commonest in Tanzania, Nigeria, and Philippines. Very seldom, Isumo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Isumo | Philippines, Nigeria, Tanzania, India, Venezuela |