Crossword puzzle clue "what descartes called himself"

What Descartes called himself

Friend of Descartes ... or, in English, question pondered by Descartes?

"___ should keep himself to himself": "Treasure Island"

"Man will do many things to get himself loved, he will do all things to get himself ___": Mark Twain

What the dishonest candidate called himself?

What Shelley called himself

Dadaist who called himself both Hans and Jean

What Hamlet called himself