Hydulphe of Lobbes was a 7th-century Frankish saint and monk who played a significant role in the religious landscape of Austrasia. Born around 630, he was the grandson of Walbert III and later married his cousin, Aye of the Ardennes. After a period of marriage characterized by a shared vow of continence, the couple eventually separated to pursue religious lives. Hydulphe eventually renounced his worldly wealth, donating extensive lands and villages to the monastery he helped establish, before dedicating his remaining years to monastic life.