Gui de Dampierre, Count of Flanders, Margrave of Namur, was born circa 1225 to Guillaume II de Dampierre (1196-1231) and Margaret II, Countess of Flanders (1202-1280) and died 7 March 1304 in Compiègne, France of unspecified causes. He married Mahaut de Béthune (c1220-1264) June 1246 JL . He married Isabella von Luxemburg (1247-1298) March 1256 JL . Notable ancestors include Charlemagne (747-814), Alfred the Great (849-899), Hugh Capet (c940-996), William I of England (1027-1087), Rurik (c832-879). Ancestors are from France, Germany, the United Kingdom, Belgium, Russia, Ukraine, the Netherlands, Italy.


Offspring of Gui de Dampierre and Mahaut de Béthune (c1220-1264)
Name Birth Death Joined with
Marie of Flanders (-1297)
Robert III of Flanders (1249-1322) 1249 17 September 1322 Ieper, West Flanders, Flanders, Belgium Blanche of Naples (1250-1269)
Yolande de Nevers (1247-1280)

Guillaume de Dampierre (aft1249-1311) 1249 1311 Alix de Clermont (c1270-1320)

John of Flanders (1250-1290)
Baldwin of Flanders (1252-1296)
Margaretha van Vlaanderen (c1251-1283) 1251 3 July 1285 Jan I van Brabant (1253-1294)

Beatrijs van Vlaanderen (c1253-1296) 1253 1296 Floris V van Holland (1254-1296)

Philip of Flanders (c1263-1318)

Offspring of Gui de Dampierre and Isabella von Luxemburg (1247-1298)
Name Birth Death Joined with
Beatrix of Flanders (-1307) 1307 Hugh II de Châtillon (-1307)

Margaret of Flanders (1272-1331) 1272 1331 's Gravendal Alexander of Scotland (1264-1284)
Reinoud I van Gelre (c1255-1326)

Isabelle of Flanders (-1323)
Philippa of Flanders (-1306)
Jean I de Namur (1267-1330) 1267 31 January 1330 Marguerite de Clermont
Marie d'Artois (c1291-1365)

Guy of Namur (-1311)
Henry of Flanders (-1337)
Jeanne of Flanders (-1296)

Common ancestors of Gui de Dampierre (1225-1305) and Isabella von Luxemburg (1247-1298)

  1. Adèle de Savoie (1092-1154)
  2. Alix de Namur (1109-1168)
  3. Baudouin IV de Hainaut (1108-1171)
  4. Ermesinde von Luxemburg (1075-1143)
  5. Godefroi I de Namur (1068-1139)
  6. Louis VI of France (1081-1137)
  7. Mathilde von Spanheim (c1107-c1160)
  8. Theobald II de Champagne (c1088-1152)

Footnotes (including sources)

‡ General

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