Adélaïs de Fiennes

Possibly the next generation, as daughter of Raoul de Fiennes, seigneur de Flamerselle

This Adélaïs de Fiennes is not identified in MEDLANDS, which may only mean that she is not identified in a primary document.

However she is identified by Etienne Pattou at Racines et Histoire who provides this bibliography of additional sourcing:

Additional sources: Father Anselme - Genealogical and Chronological History of the royal house of France, Tome V, p.827 (alliance Bournonville) Paris (1730) and Tome VI, pp. 169-170 (Fiennes) (despite some confusion of generations), Europaïsche Stammtafeln Volume VII, pp. 18 (Châtillon & Saint-Pol), p. 89 (Gavre); volume VIII, p.23 (Wavrin), etc., Chroniques de Froissart, http://www.heralogic.eu/txt_bs1866_evmon.html: Armorial of the bishops of Montpellier - by M. A. Fourtier - 1866, Génanet (J.-H. Ricome), Dictionary of the Nobility (F. A. Aubert de La Chesnaye-Desbois, ed. 1775, Heraldry & Genealogy), Contribution of Pieter Donche (03/2012) about from the posterity of Charles du Bois and Claude de Lannoy, "Genealogies of the masters of Ordinary Requests of the Hôtel du Roi ", François Blanchard 1652, "Genealogies of the Masters of Requests", F. Blanchard, 1670, "Collection of the nobility of Burgundy, Limbourg etc.", Jean Le Roux, 1715, Contribution by Alain Braillon (03/2018), "Controlling finances under the Ancien Régime: A look at the Chambers of Accounts today", Dominique The Page, 2011, “Ignaucourt. An embarrassing donation ”, Jeannine Sornay, 1987, "A prince in his hotel: the servants of the Dukes of Orleans in the 15th century ”, Elizabeth Gonzalez, 2004, Memories of the Departmental History Commission and archeology of Pas-de-Calais, Vol 25, 1987, "History of France from the establishment of the monarchy until the reign of Louis XIV", Paul François Velly, 1764, 1783 "Journal d'un bourgeois de Paris" LGF, Pocket book, 1989/90, Contribution de Jean- Luc Delefosse (03/2018, 08-09 / 2019), Contributions by Michel Réau (07/2018), "Epigraphy of Pas-de-Calais", vol.6, 1908

Pattou does make a statement worth further research: (frère d’Henri, seigneur d’Ardres ; oncle d’Adélaïs) (D’après le Père Anselme ; une autre source donne cette Adélaïs comme fille de Raoul)

(Google translation) (brother of Henri, Lord of Ardres; uncle of Adélaïs) (According to Father Anselme; another source gives this Adélaïs as daughter of Raoul)