Father of Adolf was Prince Wilhelm (1782-1827). He was maried with Adelheid Windisch-Graetz but his young wife died two years after the wedding. Leo van Pas has a nice story about his second wedding taken from memoirs of Princess Fugger: "Wilhelm, the eldest (grandson of Prince Karl Josef) went out to travel and see the world. One day he sent a message to his parents informing then he had become engaged to a Miss Friederike von Lenthe. The second eldest brother Karl was dispatched immediately to dissuade his brother from this ill-advised association. Only a short time had passed when Prince Karl himself sent a letter telling his parents that not only had he not been able to achieve his objective, but that he had become betrothed to Miss Auguste von Lenthe, the sister of his brother's bride."
The brothers married the Lenthe sisters in a double wedding on February 15th 1810.
Prince Wilhelm and Frederika had seven children, among them three sons Karl, Alexander and Adolf.
Prince Karl (1783-1847) and Augusta had seven children too, but only one son, Karl, who never married.
Unfortunately I don´t have any pictures of these beautiful or clever sisters, who made such a good marriages:))
If someone has, please post it...