Every Monday we will post an entry that hasn’t yet been published with a view towards harnessing the collective onomastic power of the internet. If you have any thoughts about the name’s origin, other variants it might be related to, other examples of its use, etc., please share them in the comments! If you wish to browse other Mystery Monday names, there is an index.
Today’s mystery name is a lovely little feminine name from 11th C Belgium. The deuterotheme is clearly either Old High German wīt, Old Saxon wīd ‘wide’ or Old Saxon widu, wido, Old High German witu ‘wood’, both of which developed into -widis or -vidis when Latinised. But the prototheme? We have no idea. If you do, please share in the comments!