Family name Joule-Gaby (Joule-Gaby 
) , around the world, is an extremely rare cognomen. Much more prevalently, Joule-Gaby is the forename as well as the last name. Parts of the name also exists independently as a last name Joule, and a first name Gaby.
| VARIANT | COUNTRY |
|---|---|
| Joule-Gaby | South Africa |