Last name Gruber-Gerardy (Gruber-Gerardy 
) , all around the world, is an extremely rare cognomen. The cognomen Gruber-Gerardy is characteristic of Western Europe, particularly Germany, where it is an extremely rare surname. Parts of the name also exists independently as a last name Gruber, and a last name Gerardy.
| VARIANT | COUNTRY |
|---|---|
| Gruber-Gerardy | Germany |