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 | Democratic Republic of the Congo, United States, India, Myanmar, Germany |
| Fash | United States, Nigeria, Cameroon, Indonesia, Germany |
| Fasto | United Kingdom, Italy, United States, Nigeria, Indonesia |
| Fastus | United States, Nigeria, Romania, Germany |