Cognomen Mwiruki (Mwiruki 
) , in the world, is a rare family name. The last name Mwiruki is habitual in Tanzania, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Mwiruki is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mwiruki | Tanzania, United States |