Montdidier is a commune in the Somme department in the administrative region of Hauts-de-France, northern France.
Enguerrand I was the Lord of Coucy from 1086 to 1116.
Erard I, Count of Brienne (1060–1114) was Count of Brienne at the end of the 11th century. He was the son of Gautier I of Brienne, count of Brienne, and his wife Eustachie of Tonnerre.
The House of Montdidier was a medieval French noble house which ruled as count of Montdidier, Dammartin and Roucy. Its earliest definite member of the family was a certain Hilduin, who died before 956 and was known as comte de Montdidier.
Ebles I of Roucy was count of Roucy from 1000 to 1033 and archbishop of Reims from 1021 to 1033.
Beltránde Risnel, also called Bertrand de Laon, was a French-born Aragonese political and military leader during the reign of Alfonso the Battler, who was his cousin. Beltrán was mainly active in the kingdoms of León and Castile, which Alfonso co-ruled for a time with his wife, Queen Urraca. He received Leonese titles and governed territories in León and Castile on behalf of the crown. He only sporadically attended the court of either King Alfonso or Queen Urraca, but he sometimes acted as a go-between. He became progressively more involved to Leonese court politics, eventually serving Alfonso VII as a count and having a marriage arranged to the king's half-sister. In 1130, he joined his father-in-law in revolt and ended up much reduced in status. He eventually rejoined Alfonso the Battler and died in battle alongside him.
Ebles II, also called Eble or Ebale, was the second Count of Roucy (1063–1103) of the House of Montdidier. He was the son and successor of Hilduin IV of Montdidier and Alice (Alix), daughter of Ebles I of Roucy. He is famous for his participation in the Reconquista, as well as for being one of the unruly barons of the Île-de-France subjugated by King Louis VI while he was still a prince. His life and character are summed up by Suger in his history of the reign of Louis VI: "Ebles was a man of great military prowess—indeed he became so bold that one day he set out for Spain with an army of a size fit only for a king—his feats of arms only made him more outrageous and rapacious in pillage, rape and all over evils."
Barthélemy de Jur was a French bishop. He was bishop of Laon from 1113 to 1151. Some documents give his name as Barthélemy de Grandson or de Joux.
Gilbert, Duke of Lorraine
Arnold I, Count of Chiny, son of Louis II, Count of Chiny, and his wife Sophie. He succeeded his father as count before 1066.
Hilduin I, Count of Montdidier. It is unknown who the parents of Hilduin were. Hilduin was the founder of the House of Montdidier, which produced the Counts of Montdidier, Dammartin and Roucy.
Hilduin II, Count of Arcis-sur-Aube, Seigneur de Ramerupt, was the nephew or son of Hilduin I, Count of Montdidier. His mother was Hersende, a noble lady who was either Hilduin I's wife or sister or the spouse of Hilduin I's unnamed brother. Hilduin II was a member of the House of Montdidier.
Hilduin III, Count of Montdidier, Seigneur de Ramerupt, son of Hilduin II, Count of Arcis-sur-Aube. He was a member of the House of Montdidier. Virtually nothing is known about his life.
Manasses, Count of Dammartin (Dammartin-en-Goële), son of Hilduin II, Count of Arcis-sur-Aube and Seigneur de Ramerupt. He was a member of the House of Montdidier. His Latin nickname was Calvus – the Bald,.
Hugh I, Count of Dammartin and Seigneur de Bulles, son of Manasses, Count of Dammartin, and Constance of France. Hugh's maternal grandfather was Robert the Pious, King of France, and his paternal great-grandfather was Hilduin I, Count of Montdidier.
Manasses, son of Hilduin III, Count of Montdidier. He was often mistaken for his uncle Manasses, Count of Dammartin.
Geoffrey II, Count of Mortagne and Count of Perche, son of Rotrou I, Viscount of Châteaudun, and Adelise de Bellême, daughter of Guérin de Domfront. Geoffrey was Count of Mortagne and Seigneur of Nogent from 1060 to 1090, and Count of Perche from 1090 until his death.
Hugh I, Count of Clermont-en-Beauvaisis (1030–1101), son of Renaud I of Clermont (1010–1088), son-in-law of Baldwin II of Clermont, the second known Count of Clermont. Hugh was an early founder of the House of Clermont.
The House of Clermont is a noble family of the French region of Picardy dating from the 10th century and included both the early counts of Clermont-en-Beauvaisis as well as many Constables of France. The house eventually merged with the House of Nesle with the marriage of Raoul II of Clermont and Gertrude of Nesle. The family is the sometimes referred to as the House of Clermont-Nesle.