While my New Lexicon cites as etymology the word feverer as the source of February, that idea is a bit hard to swallow. Obviously, the current word owes much more to the Latin word for the month than to the intervening French word. Much more likely is that the French term was adopted at some level in England after the Norman conquest, but that the original Latin calendar term was continued at some level, or resurrected later. I can’t wait for the OED to get online!
Actually, the whole “Woden” thing is a coverup. Wednesday is named after St. Wedne (864-922), the patron of fast-food establishments. She was martyred when an evil king who reigned over bigoted burghers sold her in slavery to the Scots (Clan McDonald), who fed her to the Crocs. She is often represented carrying a chihuahua, with her hair in braids.