Surname Jaston (Jaston 
) , in all the world, is a rare last name. The cognomen Jaston is characteristic of Tanzania, where it is quite a rare surname, the United States, where it is an extremely rare surname, and Mexico. Likewise, Jaston is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jaston | Tanzania, India, United States, Indonesia, Democratic Republic of the Congo |