Voltaire (1) is the pen name of François-Marie Arouet, the famous French philosopher and satirist. The modern author of "What is Goth?" (Voltaire (2)) also uses this pseudonym in tribute.
For Voltaire (1) please do not indiscriminantly combine the various editions of "Collected Works", which are in fact separate collections.
"Voltaire" (1) was the non de plume of François-Marie Arouet. Do not treat it as a surname to be combined with his given name.