Urgathoa

Urgathoa (pronounced oor-gah-THO-ah) is the Goddess of physical excess, disease, and the undeath. She is mostly worshiped by dark necromancers, the undead, and those wishing to become undead. Sometimes those who live gluttonous lifestyles make supplication to her, as do those suffering from a serious illness.
History
There are stories that suggest that Urgathoa was once a mortal woman. Upon her death, she fled Pharasma's Boneyard and returned to the World, making her the first undead creature. Her return to the mortal world is said to be the origin of disease.