Oddly enough, the present-day Nestorians are not Nestorian in the heretical sense, and there is some controversy (based on a document written by Nestorius back-in-the-day but brought to light fairly recently) as to whether Nestorius was a Nestorian!
See, this bidness of getting into a huge kerfuffle about ambiguous wording is very... er... traditional.
And by the way, Shakespeare’s plays were written by a different guy with the same name.