I just found an on-line biographical dictionary that lists medical terms and who they were named after http://www.whonamedit.com/
For example to see the bio of Thomas Hodgkin who "Hodgkin's Disease" is named after visit: http://www.whonamedit.com/doctor.cfm/1495.html
This is also good for death certificates. There are some diseases that have changed names over the years!
I've added a "Medical Terms" section on the main page and Thomas Hodgkin is the first entry in that section.
Here is my list of the better known ones...