I'm from Brittany (where i live too), and here, some typically breton names are given the same to boys and girls, such as Gaël, Gwenaël, Haël... Other names like Gwendal from Gwendoline are the male version of "frenchier" girl names. But in Brittany, a lot of people consider this part of France as a standalone country. The breton language is still alive (a lot of children go to breton schools), and a large part of the elderly talk in breton. All the signals in town are written both in French and in Breton, in the official buildings as well.
There are a lot of typically breton names, some for boys, some for girls, but people like to give them as they looks pretty to them, no regarding to the gender they are for.

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