Throughout the world, Fastus (Faste 
, Fash 
, Fasto 
) is quite a rare principally boy's, but very infrequently female first name. The first name Fastus is habitual in the Democratic Republic of the Congo, where it is quite a rare masculine name, Guatemala, where it is a rare boy's name, and Nigeria, where it is a rare largely masculine, but uncommonly girly name. Not in comparison with a country's population, this name is the most popular in the Democratic Republic of the Congo, Nigeria, and Egypt. Also, Fastus is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Faste | Myanmar, Germany, United States, India, Democratic Republic of the Congo |
| Fash | Germany, Cameroon, United States, Indonesia, Nigeria |
| Fasto | Italy, United Kingdom, United States, Indonesia, Nigeria |
| Fastus | Romania, United States, Nigeria, Germany |