The coat of arms of the Order of St. Willibrord is derived from what was the Prince-Bishopric of Utrecht. The Bishopric of Utrecht was originally founded in A.D. 695 by St. Willibrord, a missionary Benedictine monk from then the Kingdom of Northumbria in England, who was consecrated a bishop by Pope Sergius I, with permission from Prince Pepin II of Herstal, then Ruler of the Franks, who admired the great zeal with which Willibrord preached the Gospel and converted the pagans in what is now the Netherlands. Bishop and Confessor, St. Willibrord is known as "Apostle to the Frisians," first Bishop of Utrecht and Patron of our Order. In 1024, the Bishops of Utrecht were made Princes of the Holy Roman Empire.
The prominent Chi Rho cross derived from the first letters of Christ in Greek, an ancient symbol of Christianity, which first appeared to the Roman Emperor Constantine, the Great as a vision, which he believed inspired his military success at the Battle at the Milvian Bridge in Rome, and moved him in conversion to Christianity.
Heraldic Regulations for Members of the Order
All members of the Order are entitled to heraldic privileges in placing their personal Coat of Arms upon the Cross of the Order. All Professed members of the Order may use the Coat of Arms of the Order as a chief within their personal Coat of Arms. Only the Master General may quarter his arms with the Arms of the Order.
All Associate Brothers of the Confraternity may place their personal Coat of Arms upon the Cross of the Order as above
All (simply) Professed Oblate Brothers of the Order may place their
personal Coat of Arms upon the Cross of the Order as above.
All Solemnly-Professed Oblate Brothers of the Order may place their Coat of Arms upon the Cross of the Order surrounded by the Rosary of the Order as above.
The Master General of the Order may quarter his personal coat of arms with the Arms of the Order and place his coat of arms as Master upon the Cross of the Order surrounded by the Rosary of the Order as above.