Columbia subject headings:
Castell family.
Castell-Rüdenhausen, Emma, Fürstin zu, 1841-1926--Family.
Castell-Rüdenhausen, Emma, Fürstin zu, 1841-1926.
Castell-Rüdenhausen, House of.
Franks--Nobility.
Isenberg family.
Nobility--Germany--Hesse--Biography.
Harvard subject headings:
Castell family.
Castell-Rüdenhausen, Emma, Fürstin zu, 1841-1926.
Castell-Rüdenhausen, Emma, Fürstin zu, 1841-1926.--Family.
Castell-Rüdenhausen, House of.
Franks--Nobility
Isenberg family.
Nobility--Germany--Hesse--Biography.
Princeton subject headings: