Cognomen Gessner-Bay (Gessner-Bay 
) , in all the world, is an extremely rare last name. The family name Gessner-Bay is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Gessner, and a last name Bay.
| VARIANT | COUNTRY |
|---|---|
| Gessner-Bay | United States |