Conversation so far:
When did Voltaire change his name?
The author adopted the name Voltaire in 1718, following his incarceration at the Bastille.
Why did Voltaire decide to change his name?
In a letter to Jean-Baptiste Rousseau, Voltaire writes, I was so unhappy under the name of Arouet, primarily so as to cease to be confused with the poet Roi.“

Question: Why was he incarcerated at the Bastille?
Self-contained rewrite: Why was Voltaire incarcerated in Bastille?