They were not observed during the early or the later Middle Ages. In extensive lists of medieval names, such as those found in the indexes of legal proceedings which have been edited in modern times, while ordinary names without religious associations, such as William, Robert, Roger, Geoffrey, Hugh, etc. are common (around the year 1200, William was by far the most common Christian name in England), there are also a number of exceptional names which have apparently no religious associations at all. These include Ademar, Ailma, Ailward, Albreza, Alditha, Almaury, Ascelina, Avice, Aystorius (these come from the lists of those cured at the shrine of St. Thomas of Canterbury). A rubric in the official "Rituale Romanum" mandates that the priest ought to see that names of deities or of godless pagans are not given in baptism ("curet ne obscoena, fabulosa aut ridicula vel inanium deorum vel impiorum ethnicorum hominum nomina imponantur").