Addison's disease is named after Thomas Addison (1795-1860), an English physician who first published a description of this endocrine condition in 1855. Dr. Addison did not name this disease after himself, even calling it "melasma suprarenale" at one point; this condition was named after him posthumously.
Some believe that one famous sufferer of Addison's Disease was Jane Austen. (see http://www.abc.net.au/rn/science/ockham/stories/s18569.htm)
Eponymous diseases