Last name Réthi (Réthi 
) , in the entire world, is an extremely rare family name. The last name Réthi is characteristic of Eastern Europe, particularly Hungary, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Réthi | Hungary |
|
réthi aurél Hungarian otolaryngologist (1884-1976), HU (b. 1884) |
|
| leopold réthi AT (b. 1857) |
|
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| lili réthi Austrian-born artist and illustrator, US (b. 1894) |
|