Columbia subject headings:
Dhonau family.
Germans--Prussia, East (Poland and Russia)--Biography.
Waldburg-Capustigall (Schloss)--History.
Harvard subject headings:
Burg Waldburg (Waldburg, Germany)--History.
Castles--Germany--Waldburg--History.
Nobility--Germany--Waldburg--History.
Waldburg (Germany)--History.
Princeton subject headings: