Someone wrote Tywysog as an ancillary
A) This is a title
B) This is not an artefact
Therefore it does not belong in this list
Another point, artefacts, don't have 'birth and death' dates- they arrive into the game at a certain date but don't leave.
Also, I need to say again we cannot have cells for the dates with info such as "written 1282-1350". We can ONLY use a date. Again, if a book was written at a certain date then chose a single year when it enters the game.