Samthann was an early Christian nun and abbess who lived in Ireland during the eighth century. She served as the head of the monastery at Clonbroney, located near modern Ballinalee, after she was chosen by the previous abbess, Fuinnech. As one of the few female Irish saints for whom Latin biographies exist, she is remembered both as a religious leader and as a writer. Her death is recorded in the Annals of Ulster as occurring on 19 December 739.