Uilliam Ó Dubhda, also known as William Ó Dúda and similar variants, was Bishop of Killala from 1346 to 1350.[1] According to the Annals of Clonmacnoise, he apparently died of the Black Death in 1350 with several companions, "within six days because of the pestilence [in [[Mayo, Ireland|Mayo]]]."[2]