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 name is a feminine name found in France in the first half of the 12th century. We have a number of examples (all in reference to the same woman as far as we can tell) between around 1147 and 1179, all spelled Lancenna or Lanscenna. It is probably of Germanic origin, with the most likely candidate for the prototheme being Old High German lant, Old Saxon land ‘land’, which becomes lanzo, lanc- in hypocoristics.
But the deuterotheme? We have no idea.
Do you have any thoughts? Have you seen this name before? Please share in the comments!