I have searched as well, and cannot find any immediate answers. However, there may be a reason for this. Since there is no reliable test for diagnosing the disease, many people who have Wilson's Disease are subsequently not identified. Some patients only learn about having it after a relative has been diagnosed with it.
Wilson's Disease is a genetically transcended disorder. It effects many aspects of the human body but is most closely associated with neurological disorders. It is caused by excessive accumulation of copper in the person's system. Accumulation primarily occurs in the liver and the brain. Breakdown in the liver results in hepatitiss, cirrhosis of the liver and jaundice. Some patients, about half, develop neurological disorders. The disease is named after British physician Dr. Samuel Alexander Kinnier Wilson.
I searched dilligently to find famous people with the disease but have not been able to locate any.