There were quite a few of these, and I'm not striving for accuracy here, "Phillip le Hardi", "Peter the Great", "Roger the Stammer", calling a King or Duke a stammerer or even bastard seemed permissible, and then it stopped. Was this because people didn't use to have surnames, or because of illiteracy, or some other cause that it would have ceased to be a trend?
A very similar question was asked in May, so the answers may come in handy. Answers by me, u/yonderpedant and u/Valkine