What is "teneu"

Teneu (or Thenew , Thaney, Thanea, Denw, etc.) is a legendary Christian saint who was venerated in medieval Glasgow, Scotland. Traditionally she was a sixth-century Brittonic princess of the ancient kingdom of Gododdin (in what became Lothian) and the mother of Saint Kentigern, apostle to the Britons of Strathclyde and founder of the city of Glas Ghu (Glasgow). She and her son are regarded as the city's co-patrons, and Glasgow's St. Enoch Square allegedly marks the site of a medieval chapel dedicated to her, built on or near her grave ("St. Enoch" is in fact a corruption of "St. Teneu"). She is commemorated, annually, on July 18.