Giselbert, Count of Clermont

Giselbert (Gilbert) (d. after 1097), once Count of Clermont, son of Widrich II (d. after 1062), who in turn was son of Widrich I (d. before 1062), the first Count of Clermont, and his wife Hersende, ex-wife of Hildrad (Hezelin), Count of . Giselbert's sister was Ermengarde, whose first husband was Gozelon, Count of Montaigu (and so she was grandmother of Lambert, Count of Montaigu and Clermont), and second husband was Fredelon of Esch, who practiced brigandage with Giselbert.

Documents from 1083 relate how the church at St. Paul at Liège possessed property at Nandrin near the castle of Clermont. Giselbert and Fredelon terrorized the region so that the inhabitants could not do basic tasks for survival, such as gathering wood or tilling the soil. Henri de Verdun, Bishop of Liège, gave the advocacy of this land to the adjacent landowner, Conon, Count of Montaigu, and forced Giselbert and Fredelon to restore the damage they had wrought.

Giselbert married a woman named Longarde, of unknown origins. They had no known children. Giselbert, his brother Herman, his wife Longarde and his aunt Ermengarde donated the church of Saint-Symphorien to the abbey of Cluny in 1091.

By 1095, the castle of Clermont had become a menace to shipping on the Meuse, occupied by brigands, and Otbert, the new prince-bishop of Liège, organized a siege of the castle. The siege lasted from 29 June to 9 August 1095 and ended unsuccessfully, partly because Godfrey of Bouillon and other nobles in the army refused to attack the castle owing to an unresolved dispute concerning the deposed abbot of Saint-Hubert.

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