Surname Mathiu (Mathiu 
) , worldwide, is quite a rare family name. The last name Mathiu is habitual in Kenya, where it is quite a rare surname, Romania, where it is a rare surname, and Costa Rica. In absolute terms, it is commonest in Kenya, Nigeria, and India. Likewise, Mathiu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mathiu | Kenya, Argentina, India, Indonesia, Nigeria |