| Honorific Prefix: | Saint |
| Adwen | |
| Birth Date: | 5th century |
| Death Date: | 5th or 6th century |
| Birth Place: | Brycheiniog |
| Death Place: | Cornwall |
| Titles: | Princess of Brycheiniog |
| Canonized Date: | Pre-Congregation |
| Patronage: | Advent |
| Major Shrine: | Advent |
Adwen or Adwenna i purported to have been a 5th-century Christian virgin and saint.[1] According to historian Nicholas Orme, Adwen was identified in the original tradition as a brother of Nectan of Hartland, but subsequently misclassified by Charles Henderson in the 18th century as female.[2]
Adwen is therefore recorded as a daughter of Brychan, king of Brycheiniog in south Wales, in Doble's Life of Saint Nectan[3] and in Robert Hunt's collection of Cornish legends.[4] These sources associate her with the establishment of the parish of Advent in Cornwall.
The saint's feast day is unknown. In Cornwall Adwen was traditionally the patron saint of sweethearts.[5]