Clotsinda was a 7th-century saint and the abbess of Marchiennes Abbey in Flanders. Born into a noble Gascon family, she married Saint Adalbard, a nobleman in the court of the Frankish kings. Following the assassination of her husband, she dedicated herself to religious life, eventually governing the monastery at Marchiennes for four decades. Her life and her family's religious devotion are documented in the *Vita Sanctae Rictrudis*, a hagiography written by the monk Hucbald in the 10th century.