Family name Poosti (Poosti 
) , all over the world, is a very rare last name. The cognomen Poosti is characteristic of Hungary, where it is a very rare surname, Iran, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Iran, the United States, and Hungary. Very seldom, Poosti is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Poosti | Hungary, Canada, Iran, United States, United Kingdom |