Columbia subject headings:
Brettenheim family.
Catholics--Germany--Kevelaer--Biography.
Jews--Germany--Frankfurt am Main--Biography.
Jews--Germany--History--19th century.
Jews--Germany--History--20th century.
Van den Wyenbergh family.
Harvard subject headings:
Brettenheim family.
Catholics--Germany--Kevelaer--Biography.
Catholics--Germany--Kevelaer--Social conditions.
Jews, German--Germany--Frankfurt am Main--Biography.
Jews, German--Germany--Frankfurt am Main--Social conditions.
Jews, German--Germany--Kevelaer--Social conditions.
Van den Wyenbergh family.
Princeton subject headings: