(1) He is married to Isabella van Luxemburg.
They got married in the year 1256, he was 30 years old.
Child(ren):
(2) He is married to Mathilde de Béthune.
They got married
Child(ren):
GUY de Dampierre, son of GUILLAUME [II] Seigneur de Dampierre & his wife Marguerite II Ctss of Flanders ([1225/26]-Compiègne 7 Mar 1305, bur Abbaye de Flines, near Douai). The Genealogica Comitum Flandriæ Bertiniana names (in order) "Guillelmum Guodnem et Iohannem" as the three sons of "Guillelmo domino de Dampetra [et] Margaretæ", specifying that "primo mortuo sine liberis in tornramento apud Trasegnies"[630]. Matthew of Paris specifies that his parents had "two others" when he records the parentage of his brother Guillaume, but does not name the other children[631]. He succeeded his brother in 1251 as GUY joint Count of Flanders. Willem II Count of Holland, as king of Germany, pronounced that Count Guy and his mother had forfeited imperial Flanders by failing to do homage to him. His forces attacked Holland in 1253 and Count Guy was defeated at Westkappel, on the island of Walcheren, in Jul 1253 and captured. His mother sought help from Charles Duc d'Anjou, who agreed in return for receiving the county of Hainaut which he partially subjugated. A truce was negotiated between all parties 26 Jul 1254, which included an agreement to submit the dispute to Louis IX King of France for adjudication[632]. Count Guy was ransomed in 1256, when King Louis IX confirmed his 1246 decision regarding the Hainaut/Flanders split between the Avesnes/Dampierre families[633]. Guy bought the rights to Namur 20 Mar 1263 from Baudouin II titular Emperor of Constantinople[634]. He succeeded as sole Count of Flanders on the abdication of his mother 29 Dec 1278. Following complaints of maladministration, together with commercial difficulties following a long-running trading dispute with England, rebellions broke out in Bruges and Ypres in 1280/81[635]. Conflicts with France arose after the accession in 1285 of King Philippe IV. In 1290, the emperor enfeoffed Jean d'Avesnes Comte de Hainaut with imperial Flanders, although he lacked the means to enforce it. Count Guy established closer ties with England, confirmed by the Treaty of Lier 31 Aug 1294 under which his daughter was betrothed to the future Edward II King of England. Philippe IV King of France summoned Count Guy to Paris, imprisoned him for four months with two of his sons, forced him to abandon the English betrothal, and obliged him to adhere to the French embargo of trade with England[636]. In Mar 1296, Count Guy's acceptance of an invitation from Valenciennes, chief city of Hainaut, to annex it to Flanders provoked Jean d'Avesnes Comte de Hainaut into invading Flanders from Holland. King Philippe IV declared Flanders forfeit, but restored it on payment of a fine. Count Guy renounced homage to the French king, who attacked Flanders 15 Jun 1297. The Chronicle of Guillaume de Nangis records that "Karolus comes Valesii" captured "Guido comes Flandrensium...cum duobus filiis Roberto et Guillermo" in 1299[637]. He attacked again 6 Jan 1300, incorporated Flanders into the royal domain, took Count Guy and his sons as prisoners to Paris, and appointed Jacques de Châtillon as royal lieutenant. An uprising followed in Bruges, prompting another French invasion which was heavily defeated at Courtrai 11 Jul 1302. The French navy defeated the Flemish at Zierikzee in 1304, and an indecisive battle at Mons-en-Pévèle followed 18 Aug 1304[638]. The Continuatio of the Chronicle of Guillaume de Nangis records the death in Feb 1305 of "Guido comes Flandrensis", while still in captivity, the return of his body to Flanders, and his burial "Marguetæ"[639].
m firstly (contract 2 Feb 1246) MATHILDE de Béthune, dame de Béthune, Dendermonde, Richebourg et Warneton, daughter of ROBERT [VII] Seigneur de Béthune & his wife Elisabeth de Morialmes (after 1230-8 Nov 1264). The Genealogia Comitum Flandriæ names "Mathilde filia Roberti Tenremontensis" as wife of "Guido frater eius [=Willelmus]"[640]. The testament of "Mahaut feme au…Guion comte de Flandre et dame de Béthune", dated Mar 1250, is witnessed by "…monseigneur Robert sénéchal de Flandre, monseigneur Hellyn son frère, monseigr Guillaume de Grimberghes"[641]. The Annales Blandinienses record the wife of Comte Guy as "filiam Roberti advocati Bethunensis", and the death of "Mathildis uxor Widonis comitis" in 1262[642].
m secondly (May 1264) ISABELLE de Luxembourg, daughter of HENRI II Comte de Luxembourg & his wife Marguerite de Bar, dame de Ligny-en-Barrois (-25 Sep 1298). The Iohannis de Thilrode Chronicon names "Elysabeth filia Henrici comitis de Lucemborch" as the second wife of "Guido", specifying that he obtained the county of Namur through her[643]. The History of the Bishops of Liège written by Jean Hocsemius, canon at Liège, records that "Isabella Flandriæ comitissa soror...comitis Lutzilburgensis" appointed “dominum de Falcomonte” to “terræ dotis suæ Namurcensis” in 1288 after “bellum apud castrum de Waronc” in which her brother was killed[644].
Guy & his first wife had eight children:
ROBERT de Flandre ([1249]-Ypres 17 Sep 1322, bur Ypres Saint Martin, transferred to Ypres Cathedral).
GUILLAUME de Flandre "Sans-Terre" (after 1249-1311).
JEAN de Flandre ([1250]-Anhève 14 Apr 1292, bur Flines-lez-Raches).
MARGUERITE de Flandre ([1251]-3 Jul 1285, bur Brussels Franciscan Church).
BAUDOUIN de Flandre ([1252]-1296)
MARIE de Flandre (1253-[1297], bur Châteauvillain).
BEATRIX de Flandre (1260-23 Mar 1296)
PHILIPPE de Flandre ([1263]-[Naples] [Nov] 1308, bur Naples San Lorenzo Maggiore).
Guy & his second wife had eight children:
MARGUERITE de Flandre ([1265?]-after 17 Oct 1327, maybe 1331?)
JEANNE de Flandre (-1296).
BEATRIX de Flandre ([1266?] or [1270/73?]-after 1307).
JEAN de Flandre ([1267/75?]-[28 Oct 1329/31 Jan 1330], Bruges, église des Cordeliers).
GUY de Flandre ([1270/78?]-Pavia [10/15] Oct 1311).
HENRI de Flandre ([1275/80?]-6 Nov 1337, bur Bruges)
ISABELLE de Flandre (-1323)
PHILIPPINE de Flandre (-Paris 2 Feb 1304).
Bronnen:
[630] Genealogica Comitum Flandriæ Bertiniana, Continuatio Leidensis et Divionensis (Cod. Divion. et Cisterc. addunt), MGH SS IX, p. 308.
[631] MP, Vol. V, 1254, p. 435.
[632] Bayley (1949), p. 39.
[633] Nicholas (1992), p. 157.
[634] Kerrebrouck (2000), p. 462.
[635] Nicholas (1992), pp. 181-4.
[636] Nicholas (1992), pp. 187-8.
[637] RHGF XX, Chronicon Guillelmi de Nangiaco, p. 582.
[638] Nicholas (1992), pp. 189-95.
[639] RHGF XX, Continuatio Chronici Guillelmi de Nangiaco, p. 591.
[640] Iohannis de Thielrode Genealogia Comitum Flandriæ MGH SS IX, p. 335.
[641] La Gorgue-Rosny, L. E. de (1877) Recherches généalogiques sur les comtés de Ponthieu, de Boulogne, de Guines et pays circonvoisins, Documents inédits (Boulogne-sur-Mer), p. 79.
[642] Annales Blandinienses 1250 and 1262, MGH SS V, p. 31.
[643] Iohannis de Thilrode Chronicon 19, MGH SS XXV, p. 575.
[644] Du Chesne, A. (1631) Histoire généalogique de la maison royale de Dreux (Paris), Luxembourg, Preuves, p. 85.
https://fmg.ac/Projects/MedLands/FLANDERS,%20HAINAUT.htm#GuyFlandersdied1305B