Alèthe of Montbard was a noblewoman from Burgundy who lived during the late 11th and early 12th centuries. Born around 1070 in Montbard, she was the daughter of Count Bernard I and the sister of André de Montbard. She married the knight Tescelin le Roux in 1085, with whom she had seven children. She is most notably remembered as the mother of Saint Bernard of Clairvaux, whose spiritual path was profoundly influenced by her guidance and her death.