Cognomen Fridericus (Frederico 
, فريدريك 
, Фредрик 
) , all over the world, is a common family name. The surname Fridericus is characteristic of Cabo Verde, where it is a common surname, Angola, where it is quite a common surname, and Portugal, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Brazil, Angola, and Cabo Verde. More prevalently, Fridericus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Frederico | Portugal, Philippines, Brazil, Angola, Mozambique |
| فريدريك | Iran, Iraq, Palestinian Territory |
| Фредрик | Armenia, Russia, Ukraine |
| Fridericus | Germany |
| andreas fridericus Dr. phil. Martin-Luther-Universität Halle-Wittenberg 1644 |
|