Lleuddad

Abbot of Bardsey. In Llywelyn Fardd's 'Canu i Cadfan', Lleuddad is praised as the cousin of Cadfan, but whether he is actually a true cousin is uncertain. In other sources Lleuddad succeeds Cadfan as the abbot of Bardsey, the implication being that he is younger.
Texts
In Llywelyn Fardd's 'Canu i Cadfan', Lleuddad is praised as the cousin of Cadfan, and in partnership with him in their protection of both Towyn and Bardsey.Genealogical text listing the names of many saints, found in five copies dating from the 1520s and into the early eighteenth century.
Genealogical text listing the names of many saints, originally compiled in the twelfth century. Additions and alterations occur in later versions, which continued to be made into the eighteenth century.
A long ode of praise to St Cadfan by Llywelyn Fardd, sung c.1150, probably in Tywyn, Merioneth.
Further reading
Barry J. Lewis, Bonedd y Saint: An Edition and Study of the Genealogies of the Welsh Saints (Dublin: Dublin Institute for Advanced Studies, 2023), 190–200