For 10 points—name this fianceé of Juliet, whose name is also given to a city which contained an American in a George Gershwin work.
One writer with this surname wrote the preface to Stella Adler on Ibsen, Strindberg, and Chekhov and wrote biographies of Greta Garbo and Louise Brooks.  Another writer with this surname collaborated with Gaston Raynaud on Mystère de la passion d'Arnoul Greban and wrote Legendes du Moyen Age and Francois Villon.  This word is also the surname of the designer of the town hall of Neuchatel, Switzerland and the Hotel Depont des Granges.  A fictional character with this name speaks the lines, "Give me thy torch, boy: hence, and stand aloof" and is eulogized by his killer with the lines, "I'll bury thee in a triumphant grave; a grave? O no! a lantern, slaughtered youth!"  For 10 points—name this fianceé of Juliet, whose name is also given to a city which contained an American in a George Gershwin work.
One writer with this surname wrote the preface to Stella Adler on Ibsen, Strindberg, and Chekhov and wrote biographies of Greta Garbo and Louise Brooks.  
{Paris}