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.
There are not many names in use in 11th-century France that are neither (a) new Christian/saint’s name imports nor (b) in use in preceding centuries. Today’s mystery name is one, a feminine name found in Marseille in the early part of the century. While it can possibly be connected with the prototheme ebur, given a lack of any clear explanation for the deuterotheme, this identification remains at the “possible” rather than “plausible” level. We’d love to upgrade it. Have you found any other examples of this name? Do you have thoughts about the ending -esia? Please let us know in the comments!