He was the second son of Jérémie de Tressan; from what is considered a very old Languedoc family.
His brother was François de La Vergne, Marquess of Tressan.
[3] In this capacity he advocated renewed persecution of Huguenots, which became law under Louis Henri, Duke of Bourbon.
He was selected Bishop of Nantes (France) on 2 October 1717, confirmed on 18 June 1718 and ordained on 10 July 1718.
[4] He was selected Metropolitan Archbishop of Rouen on 17 October 1723 and confirmed on 14 February 1724.