Biette de Cassinel

Biette Cassinel (French pronunciation: ​[bjɛt də kasinɛl]; c.1320s-1394) was the supposed royal mistress of Charles V of France from 1360 until 1363.[1][a]

Biette was the daughter of the François Cassinel, sergent d'armes of John II of France, and Alix Deschamps.[3] She was the sister of Ferry Cassinel, bishop of Lodève and Auxerre and eventually archbishop of Rheims.[3]

Biette was married to Gérard de Montagu by 1336.[3] She was the mother of Jean de Montagu, who would rise to become Grand Master of France.[4] It is said by some that Jean was her son by Charles V,[citation needed] while Merlet and Delachenal state there is no evidence for this.[b] Autrand states that a clerk of Parlement skipped two words, concerning Jean's execution, which incorrectly attributed Charles V as Jean's father, instead of his legitimate father Gerard de Montaigu.[6]


  1. ^ "Although Biette Cassinel has been attached occasionally to Charles V, no concrete evidence for a relationship exists."[2]
  2. ^ Merlet states that Charles V was 12 or 13 at the time of Jean's birth.[3]
    "..concerning the relations which may have existed between Charles V and the mother of Jean de Montaigu, are not justified by any proof by any reference.."[5]


  1. ^ Champion, Chez H. (1884). Société de l'histoire de Paris et de l'Ile-de-France (Tome XI ed.). Paris. p. 220.
  2. ^ Adams & Adams 2020, p. 27.
  3. ^ a b c d Merlet 1852, p. 252.
  4. ^ Merlet 1852, p. 248.
  5. ^ Delachenal 1909, p. 111.
  6. ^ Autrand 1994, p. 482.


  • Autrand, Françoise (1994). Charles V, le Sage. Fayard.
  • Adams, Tracy; Adams, Christine (2020). The Creation of the French Royal Mistress: From Agnès Sorel to Madame Du Barry. The Pennsylvania State University Press.
  • Delachenal, Roland (1909). Histoire de Charles V. Vol. I. Picard.
  • Merlet, Lucien (1852). "Biographie de Jean de Montagu, grand maître de France (1350-1409)". Bibliothèque de l'École des chartes Année. 13: 248-284. doi:10.3406/bec.1852.445064.