To be sure, there's a whole bunch of suffixes that are used for this, and some transformations seem to be completely arbitrary while some others deliberate and even a bit contrite.
Rubenesque actually takes liberties with the painter's name, which is Rubens, as does
Thoreauvian, from Thoreau.
Platonic takes advantage of the original Greek spelling of Plato's name (Platon). Shouldn't it be Platoesque instead?
Byronic is straight-forward enough. What about
Shavian, though? When did G.B. Shaw ever ask for a good shave?
And what are you supposed to do with
Edgar Allan Poe
Giacomo Puccini
or even Leonardo, for that matter?
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