Tags: Saint.
Saint Teulyddog (Old Welsh: Teulydawc; Medieval Latin: Toulidauc and Thelaucus) was a medieval Welsh saint.Accounted a disciple of Saint Dubricius Teulyddog is said to have fled with many others to Brittany during the Yellow Plague of Rhos (y Fad Felen) in the 540s. Returning to Wales he associated himself with Saint Teilo and was credited with the establishment of the clas (ecclesiastical settlement) in Carmarthen which took its medieval name Llan Teulyddog in his honor.