Louis d'Astarac, Marshal of Marestaing, Viscount of Fontrailles and Cogotois, born around 1605 in Gascony and died in 1677 in Paris.

[2] Tallemant des Réaux describes him as a man of quality who was "washed in front and behind and very ugly in the face, but who did not look like an imbecile".

[3] Loménie de Brienne also wrote that, according to him, Fontrailles was "small, ugly, hunchbacked, but full of fire, courage and wit".

[6] In 1642, the Duc d'Orléans entrusted Fontrailles with the task of negotiating with the Count-Duke of Olivares for the means of supporting Conspiration de Cinq-Mars[fr] against Cardinal Richelieu.

[7] Despite the precautions taken, Fontrailles was imprisoned the same year[8] He also took part in the Fronde before finally joining the regent's camp, but the young Louis XIV never forgave him for his schemes.