Since both the French king, Philip I, and the dowager countess of Hainaut, Richilda, were opposed to increased imperial influence—represented by the bishop of Cambrai—in the county of Flanders, they supported Hugh in his rebellion.
County of Hainaut | Hainaut | Princess Margaret, Countess of Snowdon | Sophie, Countess of Wessex | Mary, Princess Royal and Countess of Harewood | Hainaut (province) | Princess Maud, Countess of Southesk | Princess Alice, Countess of Athlone | Margaret Pole, Countess of Salisbury | Frances Hyde, Countess of Clarendon | Countess of Wessex | Edwina Mountbatten, Countess Mountbatten of Burma | Countess Elisabeth Dobržensky de Dobrženicz | Selina Hastings, Countess of Huntingdon | Margaret Howard, Countess of Nottingham | Hedwig of France, Countess of Nevers | Frances Carr, Countess of Somerset | Elizabeth de Burgh, 4th Countess of Ulster | Countess Sophia Albertine of Erbach-Erbach | Countess of Huntingdon's Connexion | Countess Dracula | Beatrice I, Countess of Burgundy | Anne Herbert, Countess of Pembroke | Alice de Lusignan, Countess of Surrey | The Countess Alice | Raine Spencer, Countess Spencer | Mary II, Countess of Menteith | Margot Asquith, Countess of Oxford and Asquith | Margaret Stanley, Countess of Derby | Margaret of Mar, 31st Countess of Mar |
Richilde and her younger son, Baldwin II, retained Hainaut, but made subsequent unsuccessful attempts to recover Flanders.
Amaury III of Montfort(c. 1070–1127), married Richude (Richilde) de Hainault and Agnes de Garland.