Their story
The apocryphal (outside the Bible and not accepted as Scripture) Acts say Judas was a Jew, nephew of St. Stephen, who showed St. Helena where the Cross was hidden, was baptized as Quiriacus, and became bishop of Jerusalem. Baring-Gould calls the story absurd: there was no patriarch of that name, and Judas died in 133, long before Helena came in 326.
Ancona nevertheless claims his relics and has him as patron. Baring-Gould thinks the saint there is a different martyr of the same name; Baronius says, on unknown authority, he was a bishop of Ancona martyred by Julian. Part of his skull is shown at Provins.
Pope Gelasius condemned the romance as apocryphal. Henry I, count of Champagne, brought part of the relics from the East to Provins and built a church there. Baring-Gould says it is hopeless to untangle the confusion caused by so many saints of the same name and by the popular Acts.

