Rhystud was a British saint living during the late 6th century. He is believed to be the grandson of Hywel the Great and the brother of Saint Cristiolus and Saint Silin. His name may represent the Latin name Restitutus, which was used by an early Bishop of London. He is sometimes conflated with Rhystyd Hên, a bishop from Caerleon-on-Usk.
Legacy and veneration
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The village of Llanrhystud takes its name from the parish church dedicated to him. A 14th-century poem by the bard Dafydd ap Gwilym mentions him in connection to Saint Dwynwen. Historically, his feast day was observed as a fair during the Ember Week preceding Christmas. A stained-glass window from 1965 depicts the saint within the church in Ceredigion.