Canna was a sixth-century nun and religious leader living in southern Wales. Often described as a mother of saints, she was the parent of Crallo and Elian. Historical accounts suggest she was the daughter of King Tewdwr Mawr, a ruler of Cornwall and Armorica. Alongside her husband Sadwrn, she traveled to Britain with Saint Cadfan to establish two different churches, located in Anglesey and Carmarthenshire. Her legacy remains tied to the religious landscape of Wales through these foundations and her descendants.