Saints - E

Elijah
Eve = First Woman, Mother of the Living. Priests who venerate her closely will develop powers of the Order of Healers and Magdalenes. They will also dislike the Undead in general.
Excommunication = The terrible power of Excommunication is only unleashed against those who truly present a threat to the Light. For more info see Excommunication.
*Ecclesiarchy = If you're looking for another fictional 'church group' inspired by Catholicism, check out the Adeptus Ministorum of Warhammer 40K.