Arnauld, Antoine, the “great Arnauld,” a French theologian, doctor of the Sorbonne, an inveterate enemy of the Jesuits, defended Jansenism against the Bull of the Pope, became religious director of the nuns of Port Royal des Champs, associated here with a circle of kindred spirits, among others Pascal; expelled from the Sorbonne and banished the country, died at Brussels (1612‒1694).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Ar`naud, Henri * Arnauld, Marie Ange`lique