The earthquake at Lisbon, which appalled other people, gave Voltaire an excellent opportunity for ridiculing the beliefs of the orthodox, first in verse (1756) and later in the (from a literary point of view) unsurpassable tale of Candide (1759).
The famous "pour encourager les autres" (that the shooting of Byng did "encourage the others" very much is not to the point) is a typical example, and indeed the whole of Candide shows the style at its perfection.
Thus Candide attacks religious and philosophical optimism, L'Homme aux quarante ecus certain social and political ways of the time, Zadig and others the received forms of moral and metaphysical orthodoxy, while some are mere lampoons on the Bible, the unfailing source of Voltaire's wit.
He had a solid judgment joined to the most unaffected simplicity; and hence, I presume, he had his name of Candide.