Symptoms: Some diseases are named based on their symptoms, such as Chronic Fatigue Syndrome. Location: Others are named after the location where they were first identified, like Ebola, named after the Ebola River in Africa. Pathogen: Diseases can also be named after the pathogen that causes them, such as HIV/AIDS. Discoverer: Sometimes, diseases are named after the person who discovered them, like Hodgkin's lymphoma.