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Isabelle of Luxembourg


Isabelle of Luxembourg

Isabelle of Luxembourg (1247–1298) was a daughter of Henry V of Luxembourg and his wife, Margaret of Bar. Isabelle was a member of the House of Luxembourg.


Isabelle was the third of seven children. Her elder brother was Henry VI, Count of Luxembourg, successor to their father. Isabelle's sister was Philippa of Luxembourg, who married John II, Count of Holland and were parents to twelve children. Philippa of Hainault, Queen consort of Edward III of England was a descendent of Philippa.

Isabelle's maternal grandparents were Henry II of Bar and his wife Philippa of Dreux. Isabelle's paternal grandparents were Waleran III of Limburg and his wife Ermesinde, Countess of Luxembourg.


In March 1265, Isabelle married Guy of Dampierre.[1] Her marriage was determined by events that occurred many years before her birth. Indeed, around 1165, her great-grandfather Henry IV the Blind, Count of Namur and Luxembourg, had no children from his first marriage. He named his brother Baldwin IV of Hainaut as his successor. Baldwin died in 1171, and Henry the Blind confirmed his nephew Baldwin V of Hainaut. But with one more attempt to have children, Henry the blind married his second wife Agnes of Gelderland. Agnes bore a daughter, Ermesinde and thus had broken the promise he had made to Baldwin. A war however ensued, with the result that Baldwin would be Henry's designated heir in Namur.[2]

Isabelle's father claimed his rights of Namur, being son of Ermesinde. Henry V failed on his claim to rule Namur. Isabelle's parents wanted to make peace with Guy over a dispute of Namur. Isabelle became Guy's second wife; his first wife, Matilda had died one year earlier. Guy already had eight children with Matilda. Isabelle gave-birth to another eight children:

Guy arranged a marriage between their daughter Philippa and Edward, Prince of Wales. However, Philip imprisoned Guy and two of his sons, forced him to call off the marriage, and imprisoned Philippa in Paris until her death in 1306. Guy was summoned before the king again in 1296, and the principal cities of Flanders were taken under royal protection until Guy paid an idemnity and surrendered his territories, to hold them at the grace of the king.

Isabelle died in the September 1298, and her husband six years later, in 1304.


Preceded by
Margaret of Bar
Marquise of Namur
Succeeded by
Margaret of Clermont
Title last held by
Matilda of Bethune
Countess of Flanders
Title next held by
Margaret I, Countess of Burgundy
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