I am sure there are many more cases than these floating around somewhere. I have a friend who is a third generation Eagle Scout, and he has kids of his own who will likely earn their Eagles within the next few years, so that's easily 4 generations.
As for my family, we are slowly growing our own crop, lol. My father is a Life Scout, but all three of his sons earned their Eagles, and now I have a brother with four sons and another with two - that'll be nine Eagles within two generations (and if I can convince some nice girl to marry my someday, maybe I will have little Eagles of my own ev