Marguerite

Marguerite was a slave girl in Souragne that became pregnant by her master Nazaris Verret. While she was still with child, he called to meet her, where he ambushed her and stabbed her to death. She survived her death and returned as a ghost, obsessed with her lost child and twisted by undeath and Verret's hatred. She haunts Black Willow island in the Maison d'Sablet.

References

Ravenloft Dungeon Master's Guide, p. 98.