John I, Marquis of Namur

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John I, Marquis of Namur

Margaret of Clermont
Marie of Artois

Noble family
House of Dampierre

Guy of Dampierre

Isabelle of Luxembourg


31 January 1330(1330-01-31)

John I of Namur (1267 – 31 January 1330) was the ruler of Namur from 1305 to 1330. He was a member of the House of Dampierre, the son of Guy of Dampierre, Count of Flanders and Marquis of Namur, and his second wife Isabelle of Luxembourg. John was the father of Blanche of Namur, Queen of Sweden and Norway.


1 Life
2 Issue
3 Sources
4 Ancestors

In September 1290, he was betrothed to Blanche of France, daughter of Philip III.
Instead, John married Margaret of Clermont, daughter of Robert, Count of Clermont and Beatrix, Dame de Bourbon, in 1307. He was Margaret’s second husband. She died after two years of marriage, in 1309.
John’s second wife was Marie of Artois (1291 – 22 January 1365, Wijnendaele), Lady of Merode, daughter of Philip of Artois and Blanche of Brittany. They were married by contract in Paris on 6 March 1310, confirmed Poissy, January 1313. John granted her as dower the castle of Wijnendale in Flanders, ratified by the Count of Flanders (his half-brother, Robert III) in 1313.


John of Namur
Marquis of Namur
1310/12 –
2 April 1335
Succeeded his father in 1330 as John II, Marquis of Namur. Buried at Kloster Spaltheim.

Guy of Namur
Marquis of Namur
1311/13 –
12 March 1336
Succeeded his brother in 1335 as Guy II, Marquis of Namur.

Henry of Namur
1312/13 –
8 October 1333
Canon at Chartres Cathedral; canon at Cambrai Cathedral, 1324; canon at Châlons-sur-Marne and Reims, 1325.

Philip of Namur
Marquis of Namur
1319 –
September 1337
Succeeded his brother in 1336 as Philip III, Marquis of Namur. Murdered at Famagusta, Cyprus.

Blanche of Namur
Queen consort of Sweden and Norway
1320 –
autumn 1363
She was accused by the noblewoman Birgitta Birgersdatter (Saint Bridget of Sweden) of having poisoned the latter’s son, her innocence of the crime only being proved at the end of the 18th century. She lived at Tønsberghus castle in Norway from 1358, because of the political situation in Sweden, and administered the fiefs of Vestfold and