Gerard I of Durbuy Luxembourgian noble (1223–1303) Parents Countess Ermesinde II, Countess of Luxembourg Waleran III, Duke of Limburg Children Isabelle de Durbuy, Heiress of Roussy Irmengarde van Limburg Catharina van Limburg Marguerite de Luxembourg Siblings Marguerite of Bar Henry V, Count of Luxembourg Catherine of Limburg Waleran of Monschau Henry IV, Duke of Limburg Elisabeth de Bar-Mousson Jutta van Limburg Sofia van Limburg Mathilde of Limburg Partners Mechtild von Kleve