Gille (II) de Lalaing, Abbesse de Flines

Notes
Abbesse de Flines en 1363.
Source : F Brassart, 1879.
Source : J de Saint Genois, 1806.
Death
Autre date de décès: 17 Mars 1383. J de Saint-Genois, 1806.
Death: F Brasssart, 1879, March 16, 1388
Death: M. Brassart, March, 17, 1380

What is the date of death? Using 17 March 1383 because Saint-Genois took his date from the monument (tomb).

Gille II de Lalaing
+ 16/03/1388 ns Abbesse de Flines (1363) (ses armes sont un parti de Lalaing & d’Aspremont)

Pattou, Etienne. “Famille & Seigneurs De Lalaing.” Racines et Histoire :
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8° Gille II de Lalaing abbess of Flines in 1363, died on March 16, 1387 (old style), buried in her church, in front of the altar of Saint Jerome. She had left to the abbey certain lands which her niece Jeanne de "Kievraing", in 1392 nun of Flines (31), was to enjoy for life; this Jeanne de Lalaing dite de Quiévrain, daughter of Simon, also became abbess (see branch of Quiévrain, IX 7°).
The coat of arms which adorned the tomb of Gille II was part of Lalaing and Aspremont (32), arms of her father and mother.

(31) Hautcoeur, Hist. de l'abbaye de Flines, pp. 388 et 486 ; et Car tul., II p. 704.

Brassart, Felix, Société Académique, editor. Souvenirs De La Flandre Wallonne, Catalogue des Nobels de Nom, de Lalaing, Dix-Septieme, L. Crépin, 1882. un Comite Historique et Archeologique: Memories of Walloon Flanders: pp. 27.
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GILLE de Lalaing (-16 Mar 1388). A charter dated 21 Dec 1346 records that “Nicollon signeur de Lalaing sen aisnet fil chevalier” sold property with the consent of “...Gillion de Reumont et demisielle Florence sa femme, demisielle Margherite de Lalaing canoinnesse de Malboege, demisielle Marie de Lalaing canoinesse de Niuielle, et demisielle Gille de Lalaing, sereurs audit signeur de Lalaing”[416]. Abbess of Flines 1363[417].

Cawley, Charles. “NORTHERN FRANCE-CAMBRAI, DOUAI, VALENCIENNES.” Medieval Lands, Foundation for Medieval Genealogy, 24 Mar. 2022, https://fmg.ac/Projects/MedLands/nfracado.htm#_Toc44147371''