FPB is correct about the name: Although Francois Marie Arouet is better known by his nom de plume "Voltaire", it is nonetheless not his real name. "Voltaire" is an anagram for "Arouet, l. j." (le jeune). (You have to think Roman letters and use an "i" for the "j" and a "v" for the "u").

Regarding: "I do not approve of what you say but I will defend to the death your right to say it": Voltaire didn't say it. (follow the link)