Globally, Leblanc-Garceau (Leblanc-Garceau 
) is an extremely rare unknown gender first name. Much more frequently, Leblanc-Garceau is the last name as well as the forename. Parts of the name also exists independently as a last name Leblanc, and a last name Garceau.
| VARIANT | COUNTRY |
|---|---|
| Leblanc-Garceau | Canada |