Issel

Venerable Issel (Eussyllt or Usyllt) was a Welsh saint of the sixth century, from the kingdom of Dyfed. He is known above all as the father of Saint Teilo. His name appears in the sources in many forms and is thought to derive from the Latin name Auxilius.

The Book of Llandaff gives his wife as Guenhaf, daughter of Liuonui. His children include Teilo and Anauved, who married King Budig of Armorica and was the mother of three saints; the oldest genealogies also show him as father of Saint Cynllo. Baring-⁠Gould says that his father was Hydwn, son of Ceredig, son of Cunedda. He is the patron of the parish church at Saundersfoot (Llanussyllt in Old Welsh), but probably not of Haroldston St Issells, whose original dedication was probably to his grandson, Saint Ismael. He is a saint of the undivided Church, honoured locally.