Entenin, also called Antoninus and Anthony, was a medieval Brittonic saint.
The name Entenin appears in a 10th-century list of Cornish saints found in the binding of a manuscript now in the Vatican Library.
[2][3] A well, known as Ventoninny, in the parish of Probus also preserves his name; it may have been a holy well historically.
[5] Entenin's cult may have originated in the Roseland parish, where he was recorded in the 12th century as a king and martyr with a feast day on 25 December.
[6] He may later have been identified with the martyr Antoninus of Alexandria, whose feast was celebrated on 9 August, as by the mid 19th century the Roseland parish held its feast day on the Sunday nearest to 10 August.