In 1076 Foulques IV third married Ermengarde de Châtel-Aillon. They were divorced in 1080.
Foulques IV fourth married [____] de Brienne, daughter of Comte Gauthier I de Brienne (-ca 1090) & Comtesse Eustachia de Bar-sur-Siene (-aft 1105). They were divorced.
Fulk married a daughter of Gauthier I of Brienne.
In 1089 Foulques IV fifth married Bertrade de Montfort (1732) , daughter of Seigneur Simon I de Montfort (ca 1026-1087) & Agnes d’ Évreux (1343) (ca 1030-). Born ca 1059. Bertrade died on 14 Feb 1117. They were divorced in 1092.