Worldwide, Fratus (Fratus 
) is a very rare largely male, but uncommonly female forename. The given name Fratus is habitual in Southern Europe, particularly Italy, where it is a rare dominantly male, but uncommonly girly name. Much more frequently, Fratus is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Fratus | Italy, Australia, United States, France, Brazil |