Isabelle of Luxembourg

Isabelle of Luxembourg
Born	c. 1247
Died	c. 1298
Spouse	Guy of Dampierre
Issue	Beatrix Margaret Isabelle Philippa John I, Marquis of Namur Guy of Namur Henry Jeanne
House	House of Luxembourg
Father	Henry V of Luxembourg
Mother	Margaret of Bar

Isabelle of Luxembourg (1247–1298) was a countess consort of Flanders and a marquis consort of Namur.

She was the 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. Her 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 descendant of Philippa. Her maternal grandparents were Henry II of Bar and his wife Philippa of Dreux, and her paternal grandparents were Waleran III of Limburg and his wife Ermesinde, Countess of Luxembourg.

In March 1265, Isabelle married Guy of Dampierre. 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, who bore a daughter, Ermesinde and thus had broken the promise he had made to Baldwin. A war ensued, with the result that Baldwin would be Henry's designated heir in Namur.

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