Two Traditions
Two distinct traditions concerning these saints have been transmitted. According to one, the twelve were the children of Saints Boniface and Thecla and were martyred shortly after their parents; the sources themselves note, however, that no reliable account of their martyrdom survives.
According to the other tradition, the title 'Twelve Holy Brothers' belongs properly to the collective enshrinement of 760, when the relics of a group of martyrs of southern Italy dating from around 303 were brought together at Benevento. On this view the description of the twelve as literal brothers reflects their later common veneration rather than a documented family relationship.