Die englischsprachige Wikipedia weiß Folgendes:
"The author adopted the name "Voltaire" in 1718, following his incarceration at the Bastille. (...) t is an anagram of AROVET LI, the Latinized spelling of his surname, Arouet, and the initial letters of le jeune ("the young").[19]
According to a family tradition among the descendants of his sister, he was known as le petit volontaire ("determined little thing") as a child, and he resurrected a variant of the name in his adult life.[20]
The name also https://en.wikipedia.org/wiki/Verlan" target="_blank">reverses the syllables of Airvault, his family's home town in the Poitou region.[21]"
Also:
1. Arovet le jeune -> abgekürzt und latinisiert: AROVET L I -> Buchstaben umgestellt: VOLTAIRE
2. Le petit volontaire -> Voltaire
3. Airvault -> Vaultair -> Voltaire