Jean de Lescun d'Armagnac (? † 1473), known as “the bastard of Armagnac”, was an ally of king Louis XI of France from before his ascension to the throne.
He was the illegitimate son of Arnaud Guillaume of Lescun, Bishop of Aire, and Annette of Armagnac de Termes. He was made Marshal of France in 1461. He was one of four men to hold this title under Louis XI. Lescun was also made Count of Comminges.
He was named seneschal of Valentinois, then governor of Guyenne “in consideration of what in the great need for the King, he had left all his parents, friends, goods and heritages which he had in Gascogne to follow it and to accompany it”.
With 1465 is married Marguerite di Saluzzo (died after 1478).
He accepted in 1469 the collar about the Michaelmas and died in 1473.