Categories for pre-1790 emigration from France have been created and used provinces. There were about two dozens of those. There is no sub-categorization of France migration categories after 1790. I simply use "France, Emigrants" combined with "AdminEntity, Immigrants from France" because I don't see a point in making migration categories for 90+ departments when the emigration was (with a few exceptions) not very significant historically. (Post-1790 emigrants have few descendants on WikiTree and so far the interest in them has been extremely limited). - 90 emigration admin entities times all the possible destinations will make an enormous number of possible categories. I hardly think that's advisable.
Please don't use Nouvelle-Aquitaine. These regions are extremely volatile. They have already changed once in less than 50 years of existence and will change again. The France project doesn't use them in categories and discourages using them in data fields. The departments are much more stable and should be preferred. But if you create a category for that, be aware that your profile will be alone in it, and for a very long time.
Another thing. The department of Charente-Maritime is absolutely still current. It still exists. It is only part of region, like all other departments, but they are very active admin entities. Also Charente-Maritime was called Charente-Inférieure until 1941.
I was not aware that the recommended country division for France was the 2016 regions and will look into this, because it's not appropriate. Thanks for the heads-up.
