The nature goddess Wiccana is worshipped by rural Brythunians. Like Ligureans, Wiccana worshippers revere the oak and the mistletoe (although both are rarer in Brythunia than in Pictland). Their symbol is the golden sickle, and they are devoted to healing.
However, the two religions are not identical. First, Wiccana only accepts priestesses; men may not directly serve the goddess. The priestesses are celibate (though not necessarily virgin), and vow never to cut their hair. Secondly, priestesses reside in the villages, rather than secluding themselves in private sanctuaries.
Text from www.tarkan.4mg.com/gods.html#Wiccana