François-Marie Arouet (; 21 November 1694 – 30 May 1778), known by his "nom de plume" Voltaire, was a French Enlightenment writer, historian, and philosopher famous for his wit, his attacks on the established Catholic Church, and his advocacy of freedom of religion, freedom of speech, and separation of church and state. 

Voltaire was a versatile and prolific writer, producing works in almost every literary form, including plays, poems, novels, essays, and historical and scientific works. He wrote more than 20,000 letters and more than 2,000 books and pamphlets. He was an outspoken advocate of civil liberties, despite the risk this placed him in under the strict censorship laws of the time. As a satirical polemicist, he frequently made use of his works to criticize intolerance, religious dogma, and the French institutions of his day. 

François-Marie Arouet was born in Paris, the youngest of the five children of François Arouet (19 August 1649 – 1 January 1722), a lawyer who was a minor treasury official, and his wife, Marie Marguerite Daumard (c. 1660 – 13 July 1701), whose family was on the lowest rank of the French nobility. Some speculation surrounds Voltaire's date of birth, because he claimed he was born on 20 February 1694 as the illegitimate son of a nobleman, Guérin de Rochebrune or Roquebrune. Two of his older brothers—Armand-François and Robert—died in infancy and his surviving brother, Armand, and sister Marguerite-Catherine were nine and seven years older, respectively. Nicknamed 'Zozo' by his family, Voltaire was baptized on 22 November 1694, with , and Marie Daumard, the wife of his mother's cousin, standing as godparents. He was educated by the Jesuits at the Collège Louis-le-Grand (1704–1711), where he was taught Latin, theology, and rhetoric; later in life he became fluent in Italian, Spanish, and English.
what was the nickname his family gave him?
'Zozo