In the old testament the term "saint" was applied to any Israelite as one of the "chosen people."  It wasn't until the 6th century AD that this term was given as a title of honour. The original christian saints were actually martyrs, meaning, they were people who were persecuted and killed, rather than deny their faith, ironically similar to the later slaughter of so many hundreds of thousands Witches who died at the hands of the christian church.

The list of christian saints is quite the mixture of legend, myth, pure fiction and most important, Pagan Gods, many of which were canonized purely because the Old Faith was so ingrained in the people, that the church couldn't eradicate this strong peaceful worship of the matriarchal religion.

So in canonizing the Pagan Gods the church assured themselves to some degree, that the pagans would be encouraged to cross over to the new religion willingly rather than be murdered. Some of the best known Pagan Gods such as Bride, the Great Mother of Goddess of England and Ireland became St. Bridgit.  Lugh, after whom the Sabbat of Lughnasadh is named.  St. Michael -  Mabon.  The Celtic God became St. Andrew.

The classic ferryman of the Styx; like Hermes, a conductor of  souls to the under world. The dead were buried with coins either in their mouths or with coins laid on their eyelids to pay for Charon's ferry. Charon's fee was christianised as St. Peter: St. Peter's bribe for opening the heavenly gates.