::::::That is the whole problem: the dogmatic sticking to a rule that might work in most cases but not in all, using a "higher title" which the protagonist is hardly known under. 
 ::::::And no, I wouldn't object to "Philipp the Handsome, Archduke of Austria either. Which title preceded the other is IMHO both an open and a not really relevant question. 
 ::::::However, since verifiability is such an important principle of WP, I had a look into the "Lexikon des Mittelalters" and looked up Philip, who is called in this book (Philipp, #15): "Ph. der Schöne, Ehzg., Fs. der Niederlande (Burgund)", which translates to Philip the Handsome, Archduke, Prince of the Low Countries/Netherlands (Burgundy). 
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