Our father among the saints Clement, in the world Willibrord (also Willibrod), c.658-739, was the Archbishop of Utrecht, Enlightener of the Netherlands, and Apostle to the Frisians. His feast day is celebrated on November 7, and the translation of his relics on November 10.
Born in Northumbria, Willibrord went to Ireland. From there he went to Friesland in Holland (c. 690) as a missionary, accompanied by eleven other monks from England. Six years later he was consecrated bishop with the name of "Clement," and he founded his Cathedral in Utrecht. His work with the Frisians bore much fruit, as also in Heligoland and Denmark. He founded the monastery of Echternach in Luxembourg in 698 where his relics remain.