 In 1209 Erard, with the consent of his unnamed wife, confirmed a donation to Basse-Fontaine by a certain "Agnete", specified as "domina" of Chacenay, probably his grandmother Agnes de Brienne.During the succession crisis of Champagne, Erard was the strongest support of Erard of Brienne-Ramerupt and was the last to reconcile with Blanche of Navarre.Uneasy with the result in Champagne, Erard took part in the Fifth Crusade (1217), but was back in Europe by 1220.