The Thiernaise patois article dos is translated into French as des, and the surname appears in various documents with 'z' instead of 's' and as one word or two (e.g., 'Dosgilbertz' or 'Desgilberts' or 'des Gilberts').
[8] However, in 1867, Auguste Jal, in his Dictionnaire critique, reported the existence of a baptismal record of 9 October 1633 in the parish of Saint-Nicolas-des-Champs, Paris, in which Montdory's wife, Marie Berthelin, served as godmother and her husband's name is given as Guillaume Gilbert, Sr de Mondory.
[7] He is first recorded as an actor on 31 March 1612 under the name Gilleberts "called Mondaury" in an act of association of a troupe organized by Valleran le Conte.
[11] Their success at the Bourgogne, where the rents were high, declined, and the company departed on a tour of the provinces and were in Holland in 1613, where they performed for the Prince of Orange.
[18] In January or February 1630, Montdory, who was now in Paris, joined Lenoir and his troupe to perform Pierre Corneille's first play, Mélite, at the Berthault Tennis Court.
[2][13] In August of that year, while performing as Herod in a revival of La Mariane, with Richelieu in the audience, Montdory suffered what has variously been described as paralysis of the tongue,[13] a burst blood vessel,[22] or an apoplectic fit.
[24] The last known document signed by him (in the presence of a notary in Montdory's home in Thiers) is dated 17 November 1653 and records a gift of 6,000 livres to his son-in-law Jean de Fédict.