Cognomen Gachuki (Gachuki 
) , all over the world, is quite a rare surname. The surname Gachuki is habitual in Kenya, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Very seldom, Gachuki is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gachuki | Kenya, United States, Brazil |