Wulfran was bishop and missionary. Born in Milly, France, he was the son of Fuldert, a courtier in the service of the Frankish King Dagobert (r. 623-639). Wulfran served in the Court of King Thierry (r. 670-687) of Neustria. Once a priest, he was appointed Bishop of Sens, replacing the previous occupant of the see, St. Amatus, who was then in exile. Wulfram resigned after a few years and set out as a missionary to preach among the Frisians. With a group of monks he converted many Frisians, including the son of the pagan ruler Radbod, before finally returning to Fontenelle, France, where he died.