I am very fascinated by the history also. Unfortunately, when I was in Klingenberg, all literature around town was in German and there was no one around at the deserted and ruined castle.I spoke to two women at the Klingenberg Winery and they said the family left a few hundred years ago, she thought to the Hamburg area. This could be my family, but unsubstantiated. People often moved in those times due to religious persecution, and my family became Mennonites in that era. There is a Museum,but it was closed. I was only there for one night. The town is southeast of Frankfurt, near Miltenberg.It is a beautiful forested area, on the eastern bank of the Main River. There is also another Klingenberg in the Neckar River area south of Frankfurt, and another Klingenberg near Dresden.It is my understanding that when these towns were established in the 1200 to 1400's a.d., that they were sometimes named after the earliest family. When the family moved, they would name the new place the same. (I would be interested in the name of the video.)I hope that we can continue to add to each other's knowledge after you get back from Illinois.