Cristiolus was a Welsh saint who lived in the 6th century.
Biography According to tradition, he was a son of Hywel, son of Emyr Llydaw and therefore brother to Saint Sulien, Saint Rhystud and Derfel Gadarn, and perhaps also Dwywe (or Dwywau).
He founded churches, including one at Anglesey.
Veneration Cristiolus is venerated in the Eastern Orthodox Church. He is commemorated on 3 November.
There are churches dedicated to Cristiolus at Llangristiolus, Anglesey, together with Eglwyswrw and Penrhydd (Pembrokeshire).
References