Surname Rünzi (Rünzi 
) , across the world, is a rare family name. The surname Rünzi is habitual in Germany, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Rünzi | United States, Germany |
| otto rünzi (b. 1876) |
|
|
| friedrich rünzi CH (b. 1904) |
|