The House of Nesle is a feudal family that spawned a long line of Counts of Soissons and eventually merged with the House of Clermont (see Counts of Clermont-en-Beauvaisis). Nesle is a commune in northern France near Saint-Quentin, Aisne.
The founder of the House of Nesle is Yves de Nesle (d. after 1076) of unknown parentage, who married a daughter of William Busac, Count of Eu and Soissons. Yves and his wife had two children:
There is some confusion as to whether Yves or his son married a daughter of William Busac.
Raoul I, who some sources identify as the founder of the family, married Raintrude (Ermentrude), possibly the heiress of the County of Soissons. Raoul and Raintrude had five children:
Yves II, the first Count of Soissons from the House of Nesle had no children and the lineage passed through his brother Raoul II, who married Gertrude of Monaigu, daughter of Lambert, Count of Montaigu and Clermont. Raoul II and Gertrude had four children:
Conon was without issue and the lineage of Counts and Countesses of Soissons continued through his brother Raoul as follows:
Conon's brother John de Nesle married Elizabeth van Peteghem, daughter of Jan I van Peteghem. John and Elizabeth had five children:
With the marriage of Gertrude and Raoul, the houses of Nesle and Clermont (see Counts of Clermont-en-Beauvaisais) were united, and sometimes referred to as the House of Clermont-Nesle.
In addition to the Clermont lineage, the son of John and Elizabeth, Raoul de Nesle, also achieved fame. Raoul married Alix de Roye, widow of John III, Count of Alençon (grandson of John I, Count of Alençon). Their son was John I de Nesle (d. 2 December 1292), who married Joan, Countess of Ponthieu, widow of Ferdinand III, King of Castile (the grandparents of Edward II, King of England). The youngest daughter of Raoul and Alix, Marie (d. after 1328), married John II, Seigneur d’Agimont, son of John I, Count of Looz and Chiny, and his second wife Isabelle de Condé. Drogo of Nesle and Ralph, Lord of Soissons, are likely related to the house but precise relationships are unknown.