Cristiolus

Cristiolus was a Welsh saint who lived in the 6th century.

St Cristiolus Church in Eglwyswrw

According to tradition, he was a son of Hywel,^[1] son of Emyr Llydaw and therefore brother to Saint Sulien, Saint Rhystud and Derfel Firm, and perhaps also Dwywe (or Dwywau).

There are churches dedicated to Cristiolus at Llangristiolus, Anglesey, together with Eglwyswrw and Penrhydd (Pembrokeshire).^[1] He is commemorated on 3 November.^[2]