As far as I am leaving in Normandy, I can give you a hand. Just ask me precisely something, and I'll try to help you. I think winkelried has a really good way to find names.
You must know that in Normandy there are not only farms (!), or not only with a "farm" name. There is a lot of "Hameaux" (hamlets in English I think, hameau in singular), which is a group of houses. They often have a single name without "farm" ("Le Foc", "La Rouxelière").