Definition of "Voltairean"

"What do you want? Nineteenth-century rationalism, Voltairian deism? We're living in a religious age, you know. I suppose Anglicanism might be a solution."

1959, Anthony Burgess, Beds in the East (The Malayan Trilogy), published 1972, page 448

[…] the skinny boy at the next table smirked with a thin Voltairian sneer.

1988, Edmund White, chapter 1, in The Beautiful Room is Empty, New York: Vintage International, published 1994

Then hearing that I was a Darwaysh and doctor—he must be an Osmanli Voltairean, that little Turk—the official snorted a contemptuous snort.

1855, Richard Francis Burton, chapter II, in A Personal Narrative of a Pilgrimage to Al-Madinah and Meccah‎, volume I, London: Tylston & Edwards, published 1893, page 21

“ […] But as for saints and relics and things, I fear I'm a bit of a Voltairian; what you would call a skeptic.”

1922, G. K. Chesterton, chapter 3, in The Man Who Knew Too Much‎