family connections: her sister married Walter Giffard, father of the 1st Earl of Buckingham of the same name; one brother William became Bishop of Evreux. She had first married Raoul de Gace, son of Robert, Archbishop of Rouen and Count of Evreux, the second son of Duke Richard the Fearless. For her second marriage, Basilia brought Hugh III the Castle of Ecouche. Basilia, daughter of Gerard de Flaitel, had important family connections: her sister married Walter Giffard, father of the 1st Earl of Buckingham of the same name; one brother William became Bishop of Evreux. She had first married Raoul de Gace, son of Robert, Archbishop of Rouen and Count of Evreux, the second son of Duke Richard the Fearless. For her second marriage, Basilia brought Hugh III the Castle of Ecouche.