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 names is a 14th C Czech masculine name:
As with many names from this particular source (and from this period more generally), this specific instance is recorded in Latin, which may disguise the underlying Czech form to some degree. (“Wr-” is not a common combination in Latin, so it’s definitely representing something foreign!) No obvious candidates come up in our searching, so we’re hoping that someone out there has a guess as to what name this might be representing! If you have any thoughts, please share them in the comments!
Dictionary of Medieval Names from European Sources 
This name is obviously related to the modern Czech word vrána “crow”. Vrána is also a modern Czech surname.