Jacut

Jacut was a 5th-century Cornish Saint who worked in Brittany. He is commemorated liturgically on 6 February.{{Cite web|url=http://celticsaints.org/2015/0206c.html|title=Celtic and Old English Saints - 6 February}}

His father was Fragan, a prince of Dumnonia, and his mother Gwen Teirbron.Brian Daniel Starr, The Life of Saint Brychan: King of Brycheiniog and Family (Brian Daniel Starr, 2008). [https://books.google.com/books?id=cn4-1dBc4vAC&dq=Saint+Sefin&pg=PA34 page 34]. The young family had fled to Brittany to avoid the plague raging in Cornwall at that time, and so grew up in Ploufragan near Saint-Brieuc with his brothers, Winwaloe and Wethenoc and a sister, Creirwy. He was educated by Budoc of Dol on the Île Lavret near Paimpol,Bowen, E. G. (1969) Saints, Seaways and Settlements. Cardiff: University of Wales (2nd ed. 1977), p. 189.Brian Daniel Starr, Ascent of the Saints: Whose Lineage Is Known (Brian Daniel Starr, 2009) [https://books.google.com/books?id=ADrLNs05pbUC&dq=Wethoc&pg=PA76 page 76]. and as an adult he founded churches in Brittany.

Today he is memorialised in the towns of Saint-Jacut-les-Pins, Saint-Jacut-du-Mené, Saint-Jacut-de-la-Mer and the Abbey of Saint-Jacut in that town.