This may not be related to the Ade family you're speaking of but I thought you might find it interesting. Jacob Ade immigrated from Germany to North America around 1883. I don't know anything about his background but in 1897/8 he was living in what was then called Paradise Ridge, TN. In March him and his entire family was murdered and even though there were several trials they all ended in mistrials and the guilty party was never charged. I used to live near the spot that it occured and there is a tombstone in the middle of a field for the entire family.