There is no Wiccan "bible" or one book, therefore, it would be pointless to ask who founded it. There are many good books written by some who founded their own type of it, like Gardnerian (the Gardners).
Early man "founded" or started Wicca, since it is simply a pagan, earth-based, spiritual path that works in harmony with seasons, doing right by other people, and observances from nature.
Since the Creator made nature, then it easily can be said that God founded Wicca, and all other religions.
