From British female writer Evelyn Beatrice Hall. From "The Friends of Voltaire".

Original sentence (French): Je ne suis pas d'accord avec ceque vous dites, mais je me battrai jusqu'à la mort pour que vous ayez le droitde le dire.

The original sentence (English) is: I disapprove of what you say, but I will defend to the death your right to say it.

Voltaire (his original French name: Voltaire, born in 1694 AD November 21, 1778 - died on May 30, 1778 at the age of 83), whose real name was Fran?ois-Marie Arouet (original name in French: Fran?ois-Marie Arouet), Voltaire was His pen name is French Enlightenment thinker, litterateur, philosopher, famous scholar, and writer.