Last name Kastas (Kastas 
) , all over the world, is a very rare cognomen. The last name Kastas is characteristic of Greece, where it is a rare surname, Norway, where it is a very rare surname, and Turkey. Not in comparison with a country's population, this name is the most popular in Greece, Turkey, and Germany. Much less frequently, Kastas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kastas | Germany, Norway, Greece, United States, Turkey |