The Schönborns owning the stunningly gorgeous Schloss Weissenstein, one of the my all-time favourite castles that I will never stop drolling over, are actually the Schönborn-Wiesentheids, one of the three branches of the family. They take their name from the small village of Wiesentheid close to Schloss Castell and Schloss Rüdenhausen and, in not the most surprising news of the century, there's also a castle located in said village, Schloss Wiesentheid. And the Castells actually also play a role in the Schloss's history as during the late medieval age, the Castells owned a moated castle in Wiesentheid. However, they seemingly weren't as smart with the money as they are today and ran up debts. So much so that Count Konrad of Castell (1519-1577) decided to sell the castle to the Valentin Fuchs of Dornheim who took up residency in Wiesentheid.
Good to know:
Schloss Wiesentheid is not open to the general public and can only viewed from the outside.