Phallic Saints
Phallic saints were actual saints or local deities who were invoked for fertility; more than vulgar representations of the phallus, phallic saints were benevolent symbols of prolificacy and reproductive fruitfulness, and objects of reverence and especial worship among barren women and young girls. Many were legitimate saints who acquired their priapic attributes through the process of folk-etymology.
Some examples include:
Ters, or St. Ters, of Antwerp, whose cult was reported on by Johannes Goropius Becanus.
Saints Cosmas and Damian, twin physicians, one of whose cult-centers was Isernia, near Naples.
St. Guignole, first abbot of Landevenec, who acquired his priapic status by confusion of his name with gignere (Fr. engendrer, "to beget"). His chapel was not closed until 1740.
St. Foutin, by assimilation of the name of Pothin (Pothinus), first bishop of Lyons, to the verb foutre (to fuck). People worshipped the phallus of St. Foutin by pouring wine on it.
St. Guerlichon (Greluchon) at Bourg Dieu
St. Gilles at Cotentin
St. Rene in Anjou (by confusion with reins, "kidneys" -once believed to be the seat of sexual power)