Cognomen Matejs (Mattheus 
, Matejs 
) , in all the world, is quite a rare family name. The last name Matejs is habitual in Belgium, where it is quite a rare surname, Latvia, and South Africa. In absolute terms, it is the most numerous in Germany, South Africa, and Belgium. Also, Matejs is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mattheus | Germany, Belgium, South Africa, United States, Brazil |
| Matejs | Germany, Latvia |