Guy I of Clermont

Guy I of Clermont-Nesle Guy Ier de Clermont-Nesle
Seigneur of Ailly and Maulette
Reign	1285-1302
Seigneur of Offemont jure uxoris
Reign	c.1294-1302
Seigneur of Breteuil ?
Reign	1285-1302
Born	c. 1255
Died	1302 Kortrijk
Spouse	Marguerite of Mello Marguerite of Thourotte possibly more
Issue	Jean I of Nesle-Offémont Alix Mahaut Péronne Raoul IV of Clermont-Nesle ?
House	House of Clermont-en-Beauvaisis also House of Creil also House of Clermont-Nesle
Father	Simon II of Clermont
Mother	Adele of Montfort

Guy I of Clermont-Nesle (c.1255 – July 11, 1302) was a Marshal of France, Seigneur (Lord) of Offemont jure uxoris, and possibly of Ailly, Maulette and Breteuil. He might have been a Seigneur of Nesle also, or used the title "Sire of Nesle" due to his family. Difficulties about the seigneurie of Breteuil are present, and the status of Ailly and Maulette in relation to Breteuil.

Guy was the youngest son of Simon II of Clermont (c. 1216 - 1286) by Adele of Montfort (d. 1279), daughter of Amaury VI of Montfort. He had three brothers and at least one sister, whose son was the famous Robert VIII Bertrand , also Marshal of France.

In 1296 he became Marshal of France, when his elder brother Raoul of Clermont, Viscount of Châteaudun and Seigneur of Nesle was already the Constable and Grand Chamberlain of France. The French King Philip "the fair" (1268 - 1314) sent the two brothers to attack the enemy at the Siege of Lille (1297), where they were victorious and took a large number of prisoners. Some descendant to Guy is said have assisted in the conquest of Guyenne by Philip's grandson King Edward III of England (1312 - 1377).

Together with his brother, under Robert II, Count of Artois as commander, he fought in the Franco-Flemish War (1297-1305) against the County of Flanders. In 1302 in the Battle of the Golden Spurs at Kortrijk, the French army was utterly defeated, all three killed and the Flemish regained independence.

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