The name Golfe du Morbihan was confirmed by the French toponymy commission for the Southern and Antarctic Lands, thus respecting the hierarchy of the topographic terms, since the Golfe du Morbihan includes several smaller bays such as the Baie des Aurores Australes, where Port-aux-Français is located. However the name Baie du Morbihan appears on various charts and is often used indifferently even in official writings.
The French toponymy commission's confirmation of the name Golfe du Morbihan for the Southern and Antarctic Lands reflects their adherence to the hierarchical structure of topographic terms. This is because the Golfe du Morbihan encompasses smaller bays like Baie des Aurores Australes, where Port-aux-Français is situated. However, the use of both names in official documents highlights the complexity of naming conventions in this region.