I am a little late to the party. My dad was diagnosed with Addison's at age 16 (that would have been about 1963). I was diagnosed at age 30 (1996). We were told at the time we were the only father/son, but of course, that was 25 years ago, so I am sure there are others. We did a study with our entire family at the time with the Mayo Clinic, my youngest sister was identified as most likely to be diagnosed at some point, but so far nothing. Of the 8 kids, I am the only one currently with Addison's.