Baring-Gould’s sources: Belgian Martyrologies. Authority: — Notices collected in Acta SS. S. Gertrude of Hamage, who is not to be mistaken for S. Gertrude of Nivelles, was the daughter of Theobald, Lord of Douai. She married a noble named Rigomer, and had by him several children, of whom Erchinoald, who was mayor of the palace to Queen Bathild, and Sigebert, who married S. Bertha, are those principally known. It is not certain whether Adalbald1 was son or grandson of S. Gertrude. On the death of her husband, S. Gertrude built an oratory at Hamage, and, after some years, Eusebia, the eldest daughter of S. Adalbald and S. Rictrudis, came to live with her. Gradually a community of religious women formed itself around Gertrude. Adalbald was assassinated in Gascony about 652, and Gertrude died not long after. Her body rested in the monastery of Hamage till 686, when S. Vindician, bishop of Cambrai and Arras, translated it to the new church at Hamage, built by Gertrude II., who had succeeded S. Eusebia.