FifthColumn's Curse of Strahd
Formerly, Donavich was the acolyte who ministered to the Village of Barovia. Since his death at the fangs of Doru, he is interred alongside his son what was momentarily a pit trap set by Sydney outside the entrance to the church.
Donavich was a devout but very troubled man, especially after Doru was turned by Strahd into a vampire spawn. He prayed day and night for the Morninglord to save Doru from undeath without destroying him, but his prayers were unanswered. His mind was largely lost before his life was.
It was Donavich who first discovered, then an infant, had wandered into the Village village from the forest and placed her with the burgomaster to raise.