The Aquileian Tradition
The fuller form of the legend, transmitted in art and hagiography, relates that the four were daughters of Valentius alone, whose brother Valentinianus persuaded them to convert and who were baptized by Hermagoras, traditionally the first bishop of Aquileia. The martyrologies that underlie this database instead distinguish the two pairs by parentage, assigning Euphemia and Dorothy to Valentius and Thecla and Erasma to Valentinianus; the sources do not fully agree on the family relationships.
In the legendary account, the women had vowed themselves to a heavenly spouse rather than accept marriage. When this was discovered they fled, were betrayed by a servant to the governor named Sebastus, and were tortured and condemned to beheading. After their death the relics were said to have been recovered from the river and a church established in their honor. These narrative elements are late and devotional in character; the historically secure core is only that four virgins of Aquileia were martyred and commemorated together on September 3.