Adalbert of Egmond was a Northumbrian Anglo-Saxon missionary. He was one of Willibrord's companions in preaching the gospel in Holland and Frisia.
Painting of Saints Bonifatius, Gregorius, Adelbert, and priest Jeroen van Noordwijk [nl], by Jan Joesten van Hillegom, 1530
Willibrord was an Anglo-Saxon monk, bishop, and missionary. He became the first Bishop of Utrecht in what is now the Netherlands, dying at Echternach in Luxembourg, and is known as the "Apostle to the
Willibrord preaching to the Frisians. Mural in the Rijksmuseum by Georg Sturm [nl].