Bertrade de Montfort (l'Amauri)
- Born: 1059, Montfort 1008
- Marriage (1): Count Foulques (Fulk) IV "The Rude" "The Surley" d'Anjou of Anjou
- Marriage (2): Philip I on 15 May 1092 1009
- Died: 1117 at age 58 1008
Noted events in her life were:
• Deserted. 980 In 1092, Bertrade deserted her husband and bigamously married King Philip I of France.
Bertrade married Count Foulques (Fulk) IV "The Rude" "The Surley" d'Anjou of Anjou, son of Geoffrey II "Ferréol" (Ironwood) Gâtinais 4th Count of Gâtinais and Countess Ermengarde (Blanche) d'Anjou. (Count Foulques (Fulk) IV "The Rude" "The Surley" d'Anjou of Anjou was born in 1043 in Anjou 1007 and died in 1109 1007.)
Bertrade next married Philip I, son of King Henri I of France and Anne of Russia (or Kiev), on 15 May 1092.1009 (Philip I was born in 1052 1010 and died in 1108 in Melun 1010.)
Noted events in their marriage were:
• Bigamists, 15 May 1092. 1009 In 1092 Bertrade left her husband, Fulk, and took up with King Philip I of France . Philip married her on 15 May 1092, despite the fact that they both had spouses living. He was so enamoured of Bertrade that he refused to leave her even when threatened with excommunication . Pope Urban II did excommunicate him in 1095, and Philip was prevented from taking part in the First Crusade . Astonishingly, Bertrade persuaded Philip and Fulk to be friends.