Career
Enguerrand was a man of many scandals. Enguerrand and Sybil's first husband became bitter enemies and continued to fight a private war. Adèle's son Thomas de Marle hated his father and joined the enemies against his father.
Thomas succeeded Enguerrand upon his death. Enguerrand was the son of Drogo, Lord of Boves. Enguerrand married Adèle (Ada) de Marle, the divorced wife of Aubry, Viscount of Coucy, daughter of Letard de Roucy, Lord of Marle.
Enguerrand and Ada had three children:
Thomas de Marle (1078–1130/31). Lord of Coucy and Marle, Count of Amiens. Beatrix de Boves (−1144).
Married Adam Châtelain d´Amiens. Robert de Coucy. Enguerrand is said to have kidnapped Sibyl of Château-Porcien, the wife of Godfrey of Namur.