Surname Gatumu (Gatumu 
) , worldwide, is a rare cognomen. The surname Gatumu is characteristic of Kenya, where it is quite a rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. In absolute terms, it is commonest in Kenya, the United States, and India. Very seldom, Gatumu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gatumu | Kenya, United Kingdom, India, United States |