User blog comment:Tommy,Klaus&Kol2012+/what will you be most dissapointed about that doesnt happen in supernatural when its over?/@comment-79.115.72.235-20190912212515/@comment-4632123-20190916151910

No, it's not. It was a fan theory for years, but Fan Fiction disproved it when Sam said the creature they were hunting wasn't one, but a deity. So that shows that the pagans and tulpas are different entities.

So no, it's not canon. The pagan origins remains a mystery, which I really hope S15 will show.